๐ป Developer Tools
Format JSON, decode Base64, test regex โ all in your browser. Nothing is uploaded to any server, so your data stays private.
JSON Viewer & Formatter
Format, view, and validate JSON data with tree view. Beautify, minify and validate JSON for free!
Use Now โ๐JSON โ YAML Converter
Convert between JSON and YAML in real-time! A must-have developer tool for config file conversion, API response inspection, and data format switching โ free in your browser.
Use Now โ๐Base64 Encoder/Decoder
Free Base64 encoding & decoding! Convert text to/from Base64, image to Base64. Essential developer tool!
Use Now โ๐URL Encoder/Decoder
Free URL encoding & decoding! Supports encodeURIComponent and encodeURI modes. Essential tool for query parameters and Unicode URLs!
Use Now โ๐Regex Tester
Real-time regex testing tool! Pattern matching, capture groups, replace preview. Presets for email, URL, phone numbers, and more!
Use Now โ๐Text Diff
Compare two texts side by side! Instantly see added, removed, and unchanged lines. Unified and side-by-side views for code review and document comparison.
Use Now โ๐Timestamp Converter
Convert Unix timestamps to dates and dates to timestamps in real-time. Auto-detects seconds or milliseconds, shows ISO 8601 and relative time.
Use Now โ๐Markdown Editor
Write Markdown with live preview. Split view, toolbar, HTML export, and download for free!
Use Now โ๐What Is My IP
Check your IP address instantly! See your country, city, timezone, and ISP (ASN) at a glance. IPv4/IPv6 supported with one-click copy!
Use Now โ๐Password Generator
Generate strong passwords with one click! Customize length, uppercase, numbers, symbols. Security strength indicator included!
Use Now โ๐JWT Decoder
Free online JWT decoder โ paste a token to instantly see its header and payload as formatted JSON. Interprets exp/iat/nbf as local time with an expiry badge. 100% client-side: your token never leaves the browser.
Use Now โ๐UUID Generator
Free UUID generator supporting v4 (crypto-random) and v7 (time-ordered, RFC 9562). Generate 1โ100 at once, uppercase and no-hyphen options, copy one or all. Runs 100% in your browser.
Use Now โ๐Hash Generator
Free hash generator โ compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 simultaneously from text, or checksum a file (up to 100MB). Case toggle, one-click copy. 100% in-browser: your data is never uploaded.
Use Now โโฑ๏ธCron Expression Parser
Free cron expression parser โ instantly explains what "0 9 * * 1-5" means in plain English, calculates the next 10 run times in your local timezone, breaks down each field, and offers common schedule presets.
Use Now โ๐DNS Lookup
Free online DNS lookup! Check A, AAAA, CNAME, MX, TXT, NS, and SOA records instantly. Query all types at once with MX priority sorting and SPF/DKIM highlighting!
Use Now โ๐Domain Info Checker
Free domain expiry checker! Look up registration date, expiry date (with days remaining), registrar, status, and nameservers via RDAP. Warns when expiry is within 30 days!
Use Now โ๐กHTTP Header Checker
Free HTTP header checker! Enter a URL to see the status code, full response headers, and redirects โ with an automatic security grade for HSTS, CSP, and 3 more headers!
Use Now โ๐คCharset Converter
Fix broken Korean text and convert charsets! Recover EUC-KR/CP949 CSV or text files to UTF-8, auto-detect encoding, and repair mojibake (รฌลกยฐรซยฆยฌ โ ์ฐ๋ฆฌ). 100% in-browser, free.
Use Now โ๐๏ธDuplicate Remover
Remove duplicate lines and see the stats. Ignore case, trim, sort options, duplicates-only / unique-only modes, and a per-value frequency table. Handles tens of thousands of lines fast โ 100% in-browser.
Use Now โ