Free Developer Toolbox for Everyday Coding
Free online developer tools for JSON, SQL, JWT, hashing, regex, and more. Format, convert, generate, and test — instantly in your browser. Privacy first — your input is processed in real time and never stored on our servers.
- No hidden charges or premium tiers
- Inputs processed in real time — never saved
- Works on desktop, tablet, and mobile
All Tools 20
Every tool is free to use — no account, no limits, no paywalls
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.
UUID Generator
Generate UUID v1, v4, v7, and Nil identifiers. Bulk generation with multiple output formats.
Hash Generator
Generate MD5, SHA, SHA3, RipeMD, NTLM, CRC, Adler32, and Whirlpool hashes from any text.
Password Generator
Generate strong passwords and passphrases. Check entropy and test password strength — all in your browser.
JWT Decoder
Decode JSON Web Tokens and inspect header and payload. Runs locally — your token stays private.
JSON Formatter
Format, validate, and minify JSON. Syntax highlighting and error detection included.
JSON Compare & Diff
Compare two JSON documents side by side with visual diff, tree view, format, minify & validate.
JsonDiff StudioURL Shortener
Shorten long URLs into compact links for WhatsApp, Instagram, or email. Track clicks from your dashboard.
LynkINURL Toolkit
Encode/decode URLs, build UTM links, parse URLs, check redirects, and verify canonical tags.
Unit Converter
Convert currency, length, weight, temperature, data size, speed, and time zones.
Regex Tester
Test regular expressions against sample text with live match highlighting.
XML Formatter
Beautify, validate, and minify XML documents with proper indentation.
YAML Converter
Convert between YAML and JSON formats bidirectionally.
HTML Beautifier
Format and beautify messy HTML markup with clean indentation.
CSS Minifier
Minify CSS stylesheets by removing whitespace and comments.
Color Tools
Convert HEX, RGB, and HSL. Pick colors, build gradients, create palettes, and check WCAG contrast.
Cron Expression Builder
Build cron expressions with human-readable descriptions, next run times, and a visual weekly scheduler.
GraphQL Playground
Query and mutation builder with schema explorer. Export requests to cURL or Postman Collection.
SQL Formatter
Format and beautify SQL queries, explain statements, generate sample INSERT data, and minify SQL.
JavaScript Beautifier
Format and beautify JavaScript code with proper indentation.
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Built for developers who value privacy
100% free forever — no trials, no premium tiers, and no hidden charges. Privacy first — your input is processed in real time and never stored on our servers.
Always Free
Every tool is completely free with no hidden fees, trials, upsells, or premium tiers — now and always.
No Data Stored
Your input is processed in real time and discarded immediately. We never store, log, or sell your data.
Instant Results
Fast client-side and server-side processing with live validation and real-time feedback.
Works Everywhere
Fully responsive design — use devStudio on desktop, tablet, or mobile without installing anything.