The All-in-OneOnline Toolbox

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JSON Formatter & Validator

Format, validate and beautify JSON data instantly in your browser. Free online JSON viewer with syntax highlighting.

12,849 uses 🔥 Hot

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MD5 Hash Generator

Generate MD5 hash for text and files instantly in your browser. Free online MD5 checksum generator with file support.

5,447 uses

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WebSocket Client Debugger

Test WebSocket connections online. Connect to any ws:// or wss:// server, send messages, auto-send heartbeats and inspect received frames right in your browser.

6,441 uses

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BT Torrent to Magnet Link

Convert .torrent files to magnet links instantly in your browser. Free online BT torrent to magnet converter.

3,260 uses

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Punycode Converter

Convert internationalized domain names (IDN) to Punycode and back online. Encode Unicode domains to xn-- ASCII or decode them, right in your browser.

4,838 uses

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Regex Tester – Test Regular Expressions Online

Free online regex tester with real-time match highlighting, capture groups, and flags (g, i, m, s, u). Paste your pattern and test string to see every match instantly, plus a quick reference of common patterns for email, URL, IP, date and more. No sign-up, data never leaves your browser.

2,240 uses

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SSL Certificate Checker

Free online SSL certificate checker. Enter any domain to inspect its HTTPS certificate instantly: expiration date and days remaining, issuer, common name, SAN list, serial number and signature algorithm. Spot expiring certificates before your site goes down.

2,934 uses

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HTTP Header Checker

Free online HTTP header checker. Inspect the response headers of any URL: status code, full redirect chain, server, caching, cookies and a security header audit (HSTS, CSP, X-Frame-Options and more) showing which protections are present or missing.

2,432 uses