All tools › Office & Developer💼 Office & Developer
Coding, operations, document conversion and text workbenches — one zone for office productivity
The Office & Developer zone merges the former developer, document conversion and text zones into one entry covering the full desktop workflow: coding and operations (JSON format, validate and convert, regex testing, code diff, Base64 and URL encoding, MD5, SHA and AES crypto, Git, Docker and Linux cheat sheets, IP, DNS and SSL diagnostics), document processing (PDF, Word, Excel, PPT and image conversion, PDF split and merge, batch rename and ZIP), and six text workbenches (cleanup, replace, extract, statistics and comparison).
All three sections share one principle: open and use, zero configuration, everything computed locally in the browser — code snippets, keys, confidential documents and text never leave your computer.
Categories are workbenches: each category matches a high-frequency scenario and lists all of its tools, with sibling navigation on every tool page; for weekly batch jobs, hand them to the desktop client.
🧾 JSON Workbench (13 tools) 🎨 Frontend Toolbox (13 tools) 🔄 Code Conversion (20 tools) 🏛️ Classical Ciphers (15 tools) 🏗️ Config Generators (15 tools) 💻 Developer Tools (9 tools) 📚 Cheat Sheets (26 tools) Regex Library Ready-made regexes for phones, emails, IDs and more Public DNS List DNS servers from Alibaba, Google, Cloudflare and more Registry Mirror Cheatsheet Copy-paste mirror commands for npm, pip, Go, Docker and more Search Bot User Agents User-Agent strings of Google, Baidu, Bing and other crawlers Locale Codes Language and region codes like zh-CN and en-US Domain Suffixes Types and uses of common TLDs ASCII Table Decimal, hexadecimal and meaning of every ASCII character Chrome Shortcuts Tab, devtools and browsing shortcuts for Chrome and Edge curl Cheat Sheet GET/POST, JSON, uploads and proxies Docker Cheat Sheet Common Docker commands by category, click to copy Excel Shortcuts & Formulas Excel keybindings plus SUMIF, VLOOKUP and friends Git Cheat Sheet Common Git commands by category, click to copy Gitmoji List Emoji for Git commits and when to use each Hello World Collection Hello World in 36 programming languages HTML Tag Reference Common tags grouped by structure, text and forms HTML Entities Named and numeric HTML entities, click to copy HTML Color Names HEX and RGB values of named colors HTTP Headers Reference Request and response headers, CORS and security headers Linux Command Cheat Sheet Common Linux commands by category, click to copy Markdown Cheat Sheet Markdown syntax quick reference with examples MySQL Cheat Sheet Create tables, CRUD, joins and debugging SQL npm Cheat Sheet Install, scripts and registry mirror commands Python Cheat Sheet Data structures, strings and standard library patterns Vim Cheat Sheet Vim modes, motions, editing, search and save commands VS Code Shortcuts Command palette, multi-cursor and terminal keybindings Windows Shortcuts Window management, screenshots and power-user keys for Win10/11 🧹 Code Formatters (9 tools) 🔣 Encoding & URL (22 tools) 🔒 Hash & Crypto (35 tools) Password Strength Checker Rate password strength with improvement tips Password Generator Generate strong random passwords with custom rules Modular Exponentiation Compute a^e mod m with big integers, no size limit Hex Calculator Hex arithmetic, bitwise ops and shifts with big integers File Checksum Compute SHA-256 and SHA-1 checksums of files Snowflake ID Generator Generate snowflake IDs in bulk for distributed systems AES Encryption AES symmetric encryption and decryption BCC & LRC Checksum XOR, LRC and additive checksums for serial and Modbus frames BLAKE2 Hash BLAKE2b and BLAKE2s variable-length digests CRC-16 & Adler Modbus, CCITT, XMODEM, ARC and Adler-32 checksums CRC32 Checksum Compute the CRC-32 checksum of text Crockford Base32 Human-friendly Base32 without I, L, O and U DES Encryption DES symmetric encryption and decryption Double SHA-256 SHA256(SHA256(x)), the Bitcoin-style double hash HMAC Generator HMAC-MD5, HMAC-SHA1 and HMAC-SHA256 IEEE 754 Converter Convert floats to and from float32/64 bit patterns JWT Decoder Decode JWT header, payload and signature JWT Generator Sign custom JWTs with an HS256 secret Keccak/SHA-3 Hash Keccak-256 (Ethereum) and SHA-3 hashes MD2 Hash Legacy MD2 hash (RFC 1319) for old-system comparison MD4 Hash Legacy MD4 hash (RFC 1320), predecessor of MD5 MD5 Hash Compute the MD5 hash of text NanoID Generator Generate NanoIDs with custom length and alphabet RC4 Encryption RC4 stream cipher for legacy systems RIPEMD-160 Hash RIPEMD-160 digest, the old Bitcoin address algorithm RSA Encryption RSA public-key encryption and private-key decryption RSA Key Generator Generate RSA key pairs locally with WebCrypto SHA Hash SHA-1, SHA-256 and SHA-512 hashes SM2 Sign & Verify Chinese national standard SM2 signing and verification SM3 Hash Chinese national standard SM3 hash digest SM4 Encryption Chinese national standard SM4 symmetric cipher ULID Generator Generate sortable ULIDs (timestamp + randomness) in bulk UUID & Password Generator Generate UUIDs and strong random passwords UUID Versions Generate UUID v1/v4/v5/v6/v7 in one place XXHash Extremely fast non-cryptographic XXH32/XXH64 🌐 Network Tools (30 tools) Well-known Ports Port to protocol reference Magnet Link Converter Parse and build magnet links, convert infohash, append trackers Map Coordinate Converter Convert between WGS84, GCJ02 and BD09 coordinates Port Checker Test whether a TCP port is open Port Scanner Scan common ports of a target host Link Cleaner Strip utm/spm tracking parameters for cleaner sharing Browser Fingerprint Inspect your browser fingerprint signals Network Checkup One-click report of your IP, browser and WebRTC leaks Thunder Link Converter Convert Thunder/Flashget/QQDL links to plain URLs ICP Filing Lookup Look up Chinese ICP filing info for a domain Online Ping Measure latency and reachability of a host Subnet Calculator Network address, broadcast and host ranges CIDR Calculator Compute subnet masks, network and host ranges DNS Lookup Query DNS resolution records for a domain HTTP Request Tester Send HTTP requests and inspect responses HTTP Methods Reference GET, POST, PUT and friends explained HTTP Status Codes Look up what each HTTP status code means IP Lookup Show your IP address and its location IP Range Expander Expand IP ranges or CIDR blocks into single addresses IP to Number Converter Convert IPv4 between integer, hex and binary IPv6 Expand/Compress Convert IPv6 addresses between full and compressed forms MAC Address Lookup Find the vendor behind a MAC prefix MIME Types MIME type for every file extension NMEA Parser Parse GPS NMEA-0183 sentences: coordinates, time, satellites SSL Certificate Check Inspect the SSL certificate of any domain User Agent Parser Parse browser and operating system details User Agent Generator Generate random browser User-Agent strings WebRTC Leak Test Check whether WebRTC leaks your real IP address WebSocket Tester Connect to a WS endpoint and exchange messages Whois Lookup Query domain registration records 📄 Document Conversion (12 tools) 📁 File Workshop (29 tools) 🧹 Text Cleanup (21 tools) 🔁 Find & Replace (15 tools) 🔄 Extract & Convert (22 tools) 📊 Count & Compare (6 tools) FAQ Is my code, file or text uploaded? No. Formatting, encoding, encryption, document conversion and text processing all run locally; pasted content and dropped files never leave your computer.
Will PDF to Word keep the layout? The conversion engine restores layout, tables and paragraph structure as much as possible; for complex scans, run OCR first to build a text layer.
Which languages can be formatted? High-frequency formats are covered: JSON, JavaScript, SQL, HTML, CSS, XML, YAML and Nginx config; for others use your IDE formatter.
Do old zone links still work? Links from the former developer, document and text zones redirect into this zone automatically, so bookmarks keep working.
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