Developer Tools

Format, encode, decode and test for developers.

Format, minify, and validate JSON instantly in your browser. Pretty-print with 2/4 spaces or tabs, spot syntax errors with exact line numbers.

Base64 Encode / Decode

Encode any text — including Unicode and emoji — to Base64, or decode Base64 strings back to UTF-8. Runs 100% in your browser.

URL Encode / Decode

Percent-encode or decode URLs and query strings instantly in your browser. Handles Unicode, special chars, and full URLs.

JWT Decoder

Decode and inspect any JWT instantly in your browser. View header, payload, claims, and expiry status — 100% client-side, nothing sent to a server.

Regex Tester

Test and debug regular expressions in real time. Highlight matches, inspect capture groups, and toggle g/i/m/s/u flags — all in your browser.

Markdown Previewer

Preview Markdown in real time with full GFM support — tables, task lists, code blocks, and more. Runs entirely in your browser.

Code Minifier (HTML/CSS/JS)

Minify HTML, CSS, and JavaScript instantly in your browser. Shrink file sizes up to 60–80% with no upload required.

Online API Tester

Test REST APIs in your browser — send any HTTP request, paste a cURL, and bypass CORS. No signup.

SQL Formatter & Beautifier

Format and beautify SQL queries online for free. Pretty-print messy SQL with dialect support — all in your browser, nothing uploaded.

XML Formatter & Minifier

Format, beautify, and minify XML instantly in your browser. Pretty-print with 2/4 spaces or tabs, or collapse XML to a single line — fully private.

Cron Expression Generator

Build and explain cron expressions in plain English. Use presets or per-field inputs, then copy a verified schedule — all processed privately in your browser.