Developer Tools146 Free Tools

Free Developer Tools

JSON formatters, base64 encoders, UUID generators, hash checkers, CSV-to-JSON & dev utilities.

JSON FormatterBase64 EncoderUUID GeneratorHash GeneratorCSV to JSONURL EncoderHTML Entities

OLD SLOW TOOLS ARE HOLDING YOU BACK

What Legacy Tools Do

  • Upload your private files to unknown cloud servers
  • Force annoying daily limits, watermarks & captcha locks
  • Require expensive monthly subscriptions or credit cards
  • Slow processing speeds with server queue waiting times

What Atuzed Delivers

  • 100% In-Browser Privacy — files never leave your device
  • Zero watermarks, zero limits, zero captcha locks
  • 100% Free Forever with unlimited file conversions
  • Instant WebAssembly processing speed on mobile & desktop

⚡ Limited Spots • No Credit Card • 100% Free Forever

Most Popular Developer Tools

GOLANG DEVELOPER ECOSYSTEMGo v1.22+ Ready High-Performance WASM & Microservices

Build High-Speed Applications with Atuzed Go APIs

Integrate over 133+ utility, document, AI, and exam processing engines directly into your Golang microservices. Enjoy sub-2ms client latency, zero external dependencies, and native Go structs.

$go get github.com/atuzed/atuzed-go
Try Interactive Go Playground

Your Go Developer API Key Active

Use this key in Authorization headers or the Official Go SDK.

Monthly Quota: 1,000,000 requests/mo
Max Burst Rate: 5,000 req/sec
Global Edge POPs: 310+ CloudFront Locations

Interactive Go API Playground

Test endpoints live in your browser & generate Go code

Content-Type: application/json
package main

import (
    "context"
    "fmt"
    "log"

    "github.com/atuzed/atuzed-go"
)

func main() {
    // Initialize Atuzed Go SDK Client
    client := atuzed.NewClient("atz_live_go_demo_key_99421")

    // Execute UPI Payment QR Generator API
    res, err := client.UPIQR.Execute(context.Background(), &atuzed.Options{
        Payload: `{  "vpa": "shopkeeper@upi",  "name": "Atuzed Merchant Store",  "amount": "499",  "note": "Order #9924"}`,
    })
    if err != nil {
        log.Fatalf("Go API Error: %v", err)
    }

    fmt.Printf("Success (200 OK) - Response: %s\n", res.RawJSON)
}
Click "Execute Live Request" to trigger response...

Go Struct Definition: UPI Payment QR Generator API

Copy and paste directly into your Go packages.

type UPIRequest struct {
    VPA    string `json:"vpa"`    // e.g. merchant@upi
    Name   string `json:"name"`   // Payee Name
    Amount string `json:"amount"` // INR amount (optional)
    Note   string `json:"note"`   // Payment Memo
}

All Developer Tools (146)

100% Free & Client-Side
Active
developer
JSON Formatter & Validator
Pretty-print, minify, format, and validate JSON code.
15.6k+ Uses⚡ Free
Active
developer
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to text.
24.7k+ Uses⚡ Free
Active
developer
URL Encoder / Decoder
Encode special characters in URLs or decode percent-encoded strings.
27.9k+ Uses⚡ Free
Active
developer
UUID / GUID Generator
Generate bulk random RFC 4122 v4 UUIDs / GUIDs.
115.5k+ Uses⚡ Free
Active
developer
CSV to JSON & JSON to CSV
Convert CSV data to JSON objects or export JSON arrays to CSV files.
21.3k+ Uses⚡ Free
Active
developer
Base64 Encoder
Professional, free online base64 encoder tool. Fast 100% client-side browser processing with zero upload.
25.0k+ Uses⚡ Free
Active
developer
Base64 Decoder
Professional, free online base64 decoder tool. Fast 100% client-side browser processing with zero upload.
103.7k+ Uses⚡ Free
Active
developer
URL Decoder
Professional, free online url decoder tool. Fast 100% client-side browser processing with zero upload.
135.3k+ Uses⚡ Free
Active
developer
HTML Encoder
Professional, free online html encoder tool. Fast 100% client-side browser processing with zero upload.
80.3k+ Uses⚡ Free
Active
developer
HTML Decoder
Professional, free online html decoder tool. Fast 100% client-side browser processing with zero upload.
108.2k+ Uses⚡ Free
Active
developer
Unicode Converter
Professional, free online unicode converter tool. Fast 100% client-side browser processing with zero upload.
99.4k+ Uses⚡ Free
Active
developer
ASCII Converter
Professional, free online ascii converter tool. Fast 100% client-side browser processing with zero upload.
107.8k+ Uses⚡ Free
Active
developer
Hex Encoder
Professional, free online hex encoder tool. Fast 100% client-side browser processing with zero upload.
104.3k+ Uses⚡ Free
Active
developer
Hex Decoder
Professional, free online hex decoder tool. Fast 100% client-side browser processing with zero upload.
84.3k+ Uses⚡ Free
Active
developer
CSV to JSON
Professional, free online csv to json tool. Fast 100% client-side browser processing with zero upload.
127.4k+ Uses⚡ Free
Active
developer
JSON to CSV
Professional, free online json to csv tool. Fast 100% client-side browser processing with zero upload.
8.7k+ Uses⚡ Free
Active
developer
CSV to XML
Professional, free online csv to xml tool. Fast 100% client-side browser processing with zero upload.
144.2k+ Uses⚡ Free
Active
developer
XML to JSON
Professional, free online xml to json tool. Fast 100% client-side browser processing with zero upload.
103.2k+ Uses⚡ Free
Active
developer
JSON to XML
Professional, free online json to xml tool. Fast 100% client-side browser processing with zero upload.
28.7k+ Uses⚡ Free
Active
developer
YAML to JSON
Professional, free online yaml to json tool. Fast 100% client-side browser processing with zero upload.
23.7k+ Uses⚡ Free
Active
developer
JSON to YAML
Professional, free online json to yaml tool. Fast 100% client-side browser processing with zero upload.
114.7k+ Uses⚡ Free
Active
developer
TSV to CSV
Professional, free online tsv to csv tool. Fast 100% client-side browser processing with zero upload.
86.9k+ Uses⚡ Free
Active
developer
CSV to SQL
Professional, free online csv to sql tool. Fast 100% client-side browser processing with zero upload.
139.5k+ Uses⚡ Free
Active
developer
JSON to SQL
Professional, free online json to sql tool. Fast 100% client-side browser processing with zero upload.
24.0k+ Uses⚡ Free
Active
developer
JSON Validator
Professional, free online json validator tool. Fast 100% client-side browser processing with zero upload.
138.9k+ Uses⚡ Free
Active
developer
XML Formatter
Professional, free online xml formatter tool. Fast 100% client-side browser processing with zero upload.
64.8k+ Uses⚡ Free
Active
developer
XML Validator
Professional, free online xml validator tool. Fast 100% client-side browser processing with zero upload.
89.8k+ Uses⚡ Free
Active
developer
CSS Formatter
Professional, free online css formatter tool. Fast 100% client-side browser processing with zero upload.
68.5k+ Uses⚡ Free
Active
developer
HTML Formatter
Professional, free online html formatter tool. Fast 100% client-side browser processing with zero upload.
10.4k+ Uses⚡ Free
Active
developer
JavaScript Formatter
Professional, free online javascript formatter tool. Fast 100% client-side browser processing with zero upload.
61.8k+ Uses⚡ Free
Active
developer
SQL Formatter
Professional, free online sql formatter tool. Fast 100% client-side browser processing with zero upload.
67.6k+ Uses⚡ Free
Active
developer
Markdown Formatter
Professional, free online markdown formatter tool. Fast 100% client-side browser processing with zero upload.
22.5k+ Uses⚡ Free
Active
developer
HTML Code Generator
Professional, free online html code generator tool. Fast 100% client-side browser processing with zero upload.
113.8k+ Uses⚡ Free
Active
developer
CSS Code Generator
Professional, free online css code generator tool. Fast 100% client-side browser processing with zero upload.
104.9k+ Uses⚡ Free
Active
developer
JavaScript Generator
Professional, free online javascript generator tool. Fast 100% client-side browser processing with zero upload.
11.9k+ Uses⚡ Free
Active
developer
SQL Generator
Professional, free online sql generator tool. Fast 100% client-side browser processing with zero upload.
6.1k+ Uses⚡ Free
Active
developer
Regex Code Generator
Professional, free online regex code generator tool. Fast 100% client-side browser processing with zero upload.
71.9k+ Uses⚡ Free
Active
developer
CRUD Generator
Professional, free online crud generator tool. Fast 100% client-side browser processing with zero upload.
48.8k+ Uses⚡ Free
Active
developer
API Code Generator
Professional, free online api code generator tool. Fast 100% client-side browser processing with zero upload.
33.3k+ Uses⚡ Free
Active
developer
Sitemap Code Generator
Professional, free online sitemap code generator tool. Fast 100% client-side browser processing with zero upload.
18.4k+ Uses⚡ Free
Active
developer
Robots.txt Code Generator
Professional, free online robots.txt code generator tool. Fast 100% client-side browser processing with zero upload.
116.6k+ Uses⚡ Free
Active
developer
Htaccess Generator
Professional, free online htaccess generator tool. Fast 100% client-side browser processing with zero upload.
39.8k+ Uses⚡ Free
Active
developer
Regex Tester
Professional, free online regex tester tool. Fast 100% client-side browser processing with zero upload.
72.9k+ Uses⚡ Free
Active
developer
JSON Path Tester
Professional, free online json path tester tool. Fast 100% client-side browser processing with zero upload.
6.6k+ Uses⚡ Free
Active
developer
XPath Tester
Professional, free online xpath tester tool. Fast 100% client-side browser processing with zero upload.
73.3k+ Uses⚡ Free
Active
developer
Cron Expression Tester
Professional, free online cron expression tester tool. Fast 100% client-side browser processing with zero upload.
145.8k+ Uses⚡ Free
Active
developer
API Tester
Professional, free online api tester tool. Fast 100% client-side browser processing with zero upload.
87.0k+ Uses⚡ Free
Active
developer
JWT Tester
Professional, free online jwt tester tool. Fast 100% client-side browser processing with zero upload.
48.6k+ Uses⚡ Free
Active
developer
SQL Query Tester
Professional, free online sql query tester tool. Fast 100% client-side browser processing with zero upload.
12.8k+ Uses⚡ Free
Active
developer
HTML Validator
Professional, free online html validator tool. Fast 100% client-side browser processing with zero upload.
144.2k+ Uses⚡ Free
Active
developer
API Key Generator
Professional, free online api key generator tool. Fast 100% client-side browser processing with zero upload.
144.6k+ Uses⚡ Free
Active
developer
Secret Generator
Professional, free online secret generator tool. Fast 100% client-side browser processing with zero upload.
143.5k+ Uses⚡ Free
Active
developer
Random String Generator
Professional, free online random string generator tool. Fast 100% client-side browser processing with zero upload.
21.3k+ Uses⚡ Free
Active
developer
Lorem Ipsum Generator
Professional, free online lorem ipsum generator tool. Fast 100% client-side browser processing with zero upload.
146.9k+ Uses⚡ Free
Active
developer
Fake Data Generator
Professional, free online fake data generator tool. Fast 100% client-side browser processing with zero upload.
44.1k+ Uses⚡ Free
Active
developer
Test Data Generator
Professional, free online test data generator tool. Fast 100% client-side browser processing with zero upload.
21.0k+ Uses⚡ Free
Active
developer
Mock JSON Generator
Professional, free online mock json generator tool. Fast 100% client-side browser processing with zero upload.
14.2k+ Uses⚡ Free
Active
developer
MD5 Generator
Professional, free online md5 generator tool. Fast 100% client-side browser processing with zero upload.
127.7k+ Uses⚡ Free
Active
developer
SHA-1 Generator
Professional, free online sha-1 generator tool. Fast 100% client-side browser processing with zero upload.
78.6k+ Uses⚡ Free
Active
developer
SHA-256 Generator
Professional, free online sha-256 generator tool. Fast 100% client-side browser processing with zero upload.
140.8k+ Uses⚡ Free
Active
developer
SHA-512 Generator
Professional, free online sha-512 generator tool. Fast 100% client-side browser processing with zero upload.
143.8k+ Uses⚡ Free
Active
developer
SHA-3 Generator
Professional, free online sha-3 generator tool. Fast 100% client-side browser processing with zero upload.
19.1k+ Uses⚡ Free
Active
developer
bcrypt Generator
Professional, free online bcrypt generator tool. Fast 100% client-side browser processing with zero upload.
147.2k+ Uses⚡ Free
Active
developer
HMAC Generator
Professional, free online hmac generator tool. Fast 100% client-side browser processing with zero upload.
31.3k+ Uses⚡ Free
Active
developer
File Hash Checker
Professional, free online file hash checker tool. Fast 100% client-side browser processing with zero upload.
146.9k+ Uses⚡ Free
Active
developer
Hash Identifier
Professional, free online hash identifier tool. Fast 100% client-side browser processing with zero upload.
39.7k+ Uses⚡ Free
Active
developer
Hash Comparator
Professional, free online hash comparator tool. Fast 100% client-side browser processing with zero upload.
46.7k+ Uses⚡ Free
Active
developer
Password Strength Checker
Professional, free online password strength checker tool. Fast 100% client-side browser processing with zero upload.
81.4k+ Uses⚡ Free
Active
developer
Hash Checker
Professional, free online hash checker tool. Fast 100% client-side browser processing with zero upload.
141.7k+ Uses⚡ Free
Active
developer
URL Safety Checker
Professional, free online url safety checker tool. Fast 100% client-side browser processing with zero upload.
92.0k+ Uses⚡ Free
Active
developer
IP Reputation Checker
Professional, free online ip reputation checker tool. Fast 100% client-side browser processing with zero upload.
104.2k+ Uses⚡ Free
Active
developer
Breach Check Tool
Professional, free online breach check tool tool. Fast 100% client-side browser processing with zero upload.
40.9k+ Uses⚡ Free
Active
developer
JWT Generator
Professional, free online jwt generator tool. Fast 100% client-side browser processing with zero upload.
79.3k+ Uses⚡ Free
Active
developer
OAuth URL Builder
Professional, free online oauth url builder tool. Fast 100% client-side browser processing with zero upload.
68.7k+ Uses⚡ Free
Active
developer
Basic Auth Generator
Professional, free online basic auth generator tool. Fast 100% client-side browser processing with zero upload.
146.0k+ Uses⚡ Free
Active
developer
TOTP Generator
Professional, free online totp generator tool. Fast 100% client-side browser processing with zero upload.
85.8k+ Uses⚡ Free
Active
developer
QR TOTP Generator
Professional, free online qr totp generator tool. Fast 100% client-side browser processing with zero upload.
9.5k+ Uses⚡ Free
Active
developer
Session Token Generator
Professional, free online session token generator tool. Fast 100% client-side browser processing with zero upload.
22.0k+ Uses⚡ Free
Active
developer
Random Token Generator
Professional, free online random token generator tool. Fast 100% client-side browser processing with zero upload.
140.4k+ Uses⚡ Free
Active
developer
Wallet Address Validator
Professional, free online wallet address validator tool. Fast 100% client-side browser processing with zero upload.
8.4k+ Uses⚡ Free
Active
developer
Crypto Converter
Professional, free online crypto converter tool. Fast 100% client-side browser processing with zero upload.
75.3k+ Uses⚡ Free
Active
developer
Gas Calculator
Professional, free online gas calculator tool. Fast 100% client-side browser processing with zero upload.
136.0k+ Uses⚡ Free
Active
developer
Token Unit Converter
Professional, free online token unit converter tool. Fast 100% client-side browser processing with zero upload.
51.8k+ Uses⚡ Free
Active
developer
Wei Converter
Professional, free online wei converter tool. Fast 100% client-side browser processing with zero upload.
125.4k+ Uses⚡ Free
Active
developer
Gwei Converter
Professional, free online gwei converter tool. Fast 100% client-side browser processing with zero upload.
97.3k+ Uses⚡ Free
Active
developer
Transaction Decoder
Professional, free online transaction decoder tool. Fast 100% client-side browser processing with zero upload.
50.8k+ Uses⚡ Free
Active
developer
ABI Decoder
Professional, free online abi decoder tool. Fast 100% client-side browser processing with zero upload.
98.5k+ Uses⚡ Free
Active
developer
ABI Encoder
Professional, free online abi encoder tool. Fast 100% client-side browser processing with zero upload.
30.2k+ Uses⚡ Free
Active
developer
Smart Contract ABI Viewer
Professional, free online smart contract abi viewer tool. Fast 100% client-side browser processing with zero upload.
75.9k+ Uses⚡ Free
Active
developer
Function Selector
Professional, free online function selector tool. Fast 100% client-side browser processing with zero upload.
107.3k+ Uses⚡ Free
Active
developer
Keccak Hash Generator
Professional, free online keccak hash generator tool. Fast 100% client-side browser processing with zero upload.
91.0k+ Uses⚡ Free
Active
developer
Solidity Formatter
Professional, free online solidity formatter tool. Fast 100% client-side browser processing with zero upload.
52.2k+ Uses⚡ Free
Active
developer
Solidity Compiler Interface
Professional, free online solidity compiler interface tool. Fast 100% client-side browser processing with zero upload.
86.0k+ Uses⚡ Free
Active
developer
Contract Bytecode Viewer
Professional, free online contract bytecode viewer tool. Fast 100% client-side browser processing with zero upload.
22.6k+ Uses⚡ Free
Active
developer
Event Decoder
Professional, free online event decoder tool. Fast 100% client-side browser processing with zero upload.
91.0k+ Uses⚡ Free
Active
developer
Calldata Decoder
Professional, free online calldata decoder tool. Fast 100% client-side browser processing with zero upload.
146.4k+ Uses⚡ Free
Active
developer
EVM Address Validator
Professional, free online evm address validator tool. Fast 100% client-side browser processing with zero upload.
106.0k+ Uses⚡ Free
Active
developer
Chain ID Lookup
Professional, free online chain id lookup tool. Fast 100% client-side browser processing with zero upload.
120.5k+ Uses⚡ Free
Active
developer
Token Calculator
Professional, free online token calculator tool. Fast 100% client-side browser processing with zero upload.
110.5k+ Uses⚡ Free
Active
developer
Market Cap Calculator
Professional, free online market cap calculator tool. Fast 100% client-side browser processing with zero upload.
51.7k+ Uses⚡ Free
Active
developer
FDV Calculator
Professional, free online fdv calculator tool. Fast 100% client-side browser processing with zero upload.
22.7k+ Uses⚡ Free
Active
developer
APY Calculator
Professional, free online apy calculator tool. Fast 100% client-side browser processing with zero upload.
60.8k+ Uses⚡ Free
Active
developer
APR Calculator
Professional, free online apr calculator tool. Fast 100% client-side browser processing with zero upload.
101.2k+ Uses⚡ Free
Active
developer
Staking Calculator
Professional, free online staking calculator tool. Fast 100% client-side browser processing with zero upload.
123.6k+ Uses⚡ Free
Active
developer
Impermanent Loss Calculator
Professional, free online impermanent loss calculator tool. Fast 100% client-side browser processing with zero upload.
130.1k+ Uses⚡ Free
Active
developer
DCA Calculator
Professional, free online dca calculator tool. Fast 100% client-side browser processing with zero upload.
81.7k+ Uses⚡ Free
Active
developer
Crypto Tax Calculator
Professional, free online crypto tax calculator tool. Fast 100% client-side browser processing with zero upload.
110.3k+ Uses⚡ Free
Active
developer
Android App Icon Generator
Professional, free online android app icon generator tool. Fast 100% client-side browser processing with zero upload.
20.4k+ Uses⚡ Free
Active
developer
iOS Icon Generator
Professional, free online ios icon generator tool. Fast 100% client-side browser processing with zero upload.
58.5k+ Uses⚡ Free
Active
developer
App Screenshot Maker
Professional, free online app screenshot maker tool. Fast 100% client-side browser processing with zero upload.
62.4k+ Uses⚡ Free
Active
developer
Play Store Graphic Maker
Professional, free online play store graphic maker tool. Fast 100% client-side browser processing with zero upload.
133.8k+ Uses⚡ Free
Active
developer
App Store Screenshot Maker
Professional, free online app store screenshot maker tool. Fast 100% client-side browser processing with zero upload.
111.6k+ Uses⚡ Free
Active
developer
Mobile Wallpaper Maker
Professional, free online mobile wallpaper maker tool. Fast 100% client-side browser processing with zero upload.
70.7k+ Uses⚡ Free
Active
developer
Phone Wallpaper Cropper
Professional, free online phone wallpaper cropper tool. Fast 100% client-side browser processing with zero upload.
82.2k+ Uses⚡ Free
Active
developer
Mobile Image Resizer
Professional, free online mobile image resizer tool. Fast 100% client-side browser processing with zero upload.
107.3k+ Uses⚡ Free
Active
developer
Mobile Video Resizer
Professional, free online mobile video resizer tool. Fast 100% client-side browser processing with zero upload.
9.6k+ Uses⚡ Free
Active
developer
Device Mockup Generator
Professional, free online device mockup generator tool. Fast 100% client-side browser processing with zero upload.
64.5k+ Uses⚡ Free
Active
developer
Color Palette Generator
Professional, free online color palette generator tool. Fast 100% client-side browser processing with zero upload.
19.0k+ Uses⚡ Free
Active
developer
Gradient Generator
Professional, free online gradient generator tool. Fast 100% client-side browser processing with zero upload.
61.1k+ Uses⚡ Free
Active
developer
Shadow Generator
Professional, free online shadow generator tool. Fast 100% client-side browser processing with zero upload.
132.1k+ Uses⚡ Free
Active
developer
Border Radius Generator
Professional, free online border radius generator tool. Fast 100% client-side browser processing with zero upload.
81.2k+ Uses⚡ Free
Active
developer
CSS Generator
Professional, free online css generator tool. Fast 100% client-side browser processing with zero upload.
16.1k+ Uses⚡ Free
Active
developer
Button Generator
Professional, free online button generator tool. Fast 100% client-side browser processing with zero upload.
20.3k+ Uses⚡ Free
Active
developer
Glassmorphism Generator
Professional, free online glassmorphism generator tool. Fast 100% client-side browser processing with zero upload.
135.4k+ Uses⚡ Free
Active
developer
CSS Animation Generator
Professional, free online css animation generator tool. Fast 100% client-side browser processing with zero upload.
23.4k+ Uses⚡ Free
Active
developer
SVG Generator
Professional, free online svg generator tool. Fast 100% client-side browser processing with zero upload.
10.9k+ Uses⚡ Free
Active
developer
Favicon Generator
Professional, free online favicon generator tool. Fast 100% client-side browser processing with zero upload.
6.5k+ Uses⚡ Free
Active
developer
Color Picker
Professional, free online color picker tool. Fast 100% client-side browser processing with zero upload.
81.3k+ Uses⚡ Free
Active
developer
Color Converter
Professional, free online color converter tool. Fast 100% client-side browser processing with zero upload.
38.8k+ Uses⚡ Free
Active
developer
HEX to RGB
Professional, free online hex to rgb tool. Fast 100% client-side browser processing with zero upload.
114.7k+ Uses⚡ Free
Active
developer
RGB to HEX
Professional, free online rgb to hex tool. Fast 100% client-side browser processing with zero upload.
54.6k+ Uses⚡ Free
Active
developer
HEX to HSL
Professional, free online hex to hsl tool. Fast 100% client-side browser processing with zero upload.
123.9k+ Uses⚡ Free
Active
developer
HSL to RGB
Professional, free online hsl to rgb tool. Fast 100% client-side browser processing with zero upload.
16.4k+ Uses⚡ Free
Active
developer
Palette Generator
Professional, free online palette generator tool. Fast 100% client-side browser processing with zero upload.
47.2k+ Uses⚡ Free
Active
developer
Contrast Checker
Professional, free online contrast checker tool. Fast 100% client-side browser processing with zero upload.
6.4k+ Uses⚡ Free
Active
developer
Accessibility Color Checker
Professional, free online accessibility color checker tool. Fast 100% client-side browser processing with zero upload.
49.3k+ Uses⚡ Free
Active
developer
Font Pairing Tool
Professional, free online font pairing tool tool. Fast 100% client-side browser processing with zero upload.
120.5k+ Uses⚡ Free
Active
developer
Font Preview
Professional, free online font preview tool. Fast 100% client-side browser processing with zero upload.
75.3k+ Uses⚡ Free
Active
developer
Font Identifier
Professional, free online font identifier tool. Fast 100% client-side browser processing with zero upload.
27.7k+ Uses⚡ Free
Active
developer
Font Converter
Professional, free online font converter tool. Fast 100% client-side browser processing with zero upload.
18.1k+ Uses⚡ Free
Active
developer
Text Style Generator
Professional, free online text style generator tool. Fast 100% client-side browser processing with zero upload.
58.6k+ Uses⚡ Free
Active
developer
Font Size Calculator
Professional, free online font size calculator tool. Fast 100% client-side browser processing with zero upload.
143.1k+ Uses⚡ Free
Active
developer
Line Height Calculator
Professional, free online line height calculator tool. Fast 100% client-side browser processing with zero upload.
84.8k+ Uses⚡ Free
Active
developer
Typography Scale
Professional, free online typography scale tool. Fast 100% client-side browser processing with zero upload.
103.5k+ Uses⚡ Free
Active
developer
CSS Font Generator
Professional, free online css font generator tool. Fast 100% client-side browser processing with zero upload.
102.2k+ Uses⚡ Free
Active
developer
Google Font Preview
Professional, free online google font preview tool. Fast 100% client-side browser processing with zero upload.
147.6k+ Uses⚡ Free

Why Use Our Developer Tools?

Clean Syntax Highlighting

Beautify, format, validate, and minify complex JSON, XML, and code strings instantly.

Secure Dev Utilities

Encode or decode sensitive tokens, JWTs, and API credentials securely in browser RAM.

Instant Conversion

Convert CSV datasets to structured JSON arrays or objects in milliseconds.

Cryptographic Hash Generators

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for integrity checks.

UUID v4 & Password Generator

Generate cryptographically secure random UUIDs and custom strong passwords.

One-Click Copy & Export

Copy formatted output or download as code files instantly.

Frequently Asked Questions — Developer Tools