Web Developer Tools
Free online tools for web developers — URL encoding, HTML entities, JWT, basic auth, HTTP status codes, user-agent parsing, and more.
Web Developer Tools
- Encode/decode URL-formatted strings — Encode text to URL-encoded format (percent-encoding) or decode it back. Supports
- HTML Entity Encoder & Decoder — Escape or unescape HTML entities — replace characters like <, >, &, " and ' with
- URL Parser & Inspector — Parse a URL into its separate constituent parts (protocol, origin, params, port,
- Device Information & Browser Detector — Detect detailed information about your current device and browser: screen resolu
- Basic auth generator — Generate HTTP Basic Authentication headers instantly. Enter a username and passw
- Open Graph / OG Meta Tag Generator — Generate Open Graph and Twitter Card meta tags for your website. Preview how you
- OTP code generator — Generate and validate time-based OTP (TOTP) and HMAC-based OTP (HOTP) for multi-
- MIME Types Reference & Lookup — Look up MIME types by file extension or convert extensions to MIME types. Covers
- JWT Token Decoder & Parser — Decode and inspect JWT tokens instantly. Extracts and displays the Header, Paylo
- Keycode info — Identify JavaScript keyboard event properties for any key press. Shows keyCode,
- Slugify string — Convert any string into a URL-safe slug, filename, or ID. Removes special charac
- HTML WYSIWYG Editor — Online rich text editor with live HTML preview. Format content visually using to
- User-agent parser — Detect and parse Browser, Engine, OS, CPU, and Device type/model from a user-age
- HTTP Status Codes Reference — Complete reference for all HTTP status codes (1xx–5xx) with names, descriptions,
- JSON diff — Compare two JSON objects and highlight their differences visually. Identifies ad
- Outlook SafeLink Decoder — Decode Microsoft Outlook SafeLink protected URLs and restore the original destin
Web Developer Tools Guides
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