Developer Tools. Fast.
Free. No Limits.
JSON formatter, Base64 encoder, regex tester, JWT decoder, UUID generator, diff checker — all run in your browser. No API key, no account, no data sent to any server.
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Choose what you need to do
Code Formatters
Beautify, minify, and validate code in any language
JSON Formatter
Most UsedFormat, validate, minify, and beautify JSON. Syntax highlighting with instant error detection.
JavaScript Beautifier
Beautify and format JS code. Supports ES6+, JSX, and TypeScript syntax.
CSS Minifier
Minify CSS files to reduce size. Strips whitespace, comments, and redundant rules.
SQL Formatter
Format SQL queries for MySQL, PostgreSQL, and SQLite with keyword highlighting.
XML Formatter
Format, validate, and prettify XML with collapsible tree view and syntax highlighting.
YAML Validator
Validate and format YAML files. Instantly convert YAML ↔ JSON with error reporting.
Markdown Editor
Live-preview Markdown editor with syntax highlighting and one-click HTML export.
Encoders & Decoders
Base64, URL encoding, HTML entities, and JWT tokens
Base64 Encoder / Decoder
PopularEncode and decode Base64 strings. Supports plain text and file encoding in one click.
URL Encoder / Decoder
Percent-encode and decode URLs. Safely escape special characters for use in query strings.
HTML Encoder / Decoder
Encode and decode HTML entities. Escape < > & " and all Unicode characters.
JWT Decoder
PopularDecode and inspect JWT tokens. View header, payload, expiry, and signature parts.
Generators & Testers
Generate UUIDs, hashes, and test regular expressions
Dev Utilities
Diff checker, timestamps, cron parser, chmod, and color tools
Diff Checker
Compare two text blocks side-by-side with highlighted line and character-level differences.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and back. Supports milliseconds and multiple timezones.
Cron Expression Parser
Parse and validate cron expressions. Preview the next 10 scheduled execution times.
Chmod Calculator
Build Unix file permission strings visually. Shows octal, symbolic, and human-readable output.
Color Picker
Pick colors in HEX, RGB, HSL, and HSV. Generate tints, shades, and full color palettes.
Free Developer Tools Online
Every tool runs 100% in your browser — no data is ever sent to a server. JSON, Base64, regex, UUID, hashes, and more. Bookmark them, use them offline, share them with your team.
No sign-up, no rate limits, no paywalls. Just the tool and your code.
Why developers choose Roughtools?
- ✓100% browser-based — zero data sent to any server
- ✓No account, no API key, no rate limits
- ✓Works offline after first load
- ✓Supports modern formats: ES6+, JSX, TypeScript, YAML
- ✓Syntax-highlighted output for every formatter
- ✓Free forever — no freemium tier
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