Developer Tools
Speed up daily coding with formatters, encoders, and debuggers.
16 tools in this category
JSON Formatter & Validator
Validate, format, and minify JSON data instantly in your browser. Syntax highlighting and error detection included.
Base64 Encoder & Decoder
Encode text or files to Base64 and decode Base64 strings back to plain text instantly. Free, fast, 100% client-side.
URL Encoder & Decoder
Encode URLs and decode percent-encoded strings online. Convert special characters to safe URL formats.
Hash Generator (SHA-1, SHA-256, SHA-512, MD5)
Generate SHA-1, SHA-256, SHA-384, SHA-512 and MD5 hashes from any text. Runs locally in your browser.
JWT Decoder & Inspector
Decode JSON Web Tokens to inspect their header, payload, and signature. Runs entirely in your browser.
Regex Tester & Debugger
Test regular expressions against sample text with real-time match highlighting and capture groups.
UUID & GUID Generator
Generate random UUID v4 / GUID values in bulk. Cryptographically secure identifiers for your apps.
Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back. Supports seconds, milliseconds, and ISO 8601.
CSS Minifier & Beautifier
Minify CSS to shrink file size, or beautify minified CSS to make it readable. Instant, browser-side.
HTML Viewer & Live Preview
Paste HTML and see it rendered live in a sandboxed iframe. Toggle scripts on/off and preview instantly.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly. Live, accurate, and fully client-side.
.gitignore Generator
Build a .gitignore from curated templates for Node, Python, Java, macOS, Windows, editors, and more. Free and offline.
JSON to YAML to CSV to XML Converter
Convert structured data between JSON, YAML, CSV, and XML in any direction, right in your browser. No upload, no signup.
Text & JSON Diff Checker
Compare two blocks of text or JSON and highlight added and removed lines. Optional JSON normalization, 100% client-side.
HTTP Status Codes & MIME Types Reference
Search every HTTP status code and common MIME (content) type by number, name, or extension. Fast, offline developer reference.
Secret Key Generator
Generate cryptographically-strong secrets and session keys — hex (crypto) or base64 (openssl) at any length. Free for signed-in users, 20/day.