Fotools is a free online tool collection website, offering more than 200 tools, no installation required, easy to use, fast and reliable, suitable for developers and ordinary users.
Main Tool Categories
Encoding and Encryption
Provides encoding and decoding tools such as Base64, Base32, Base58, ASCII, Unicode, URL, HTML entities, Morse code, etc. Cryptographic hashes include MD2, MD4, MD5, SHA1, SHA224, SHA256, SHA384, SHA512, SHA512/224, SHA512/256, SHA3-224, SHAKE, Keccak, Bcrypt, Scrypt, HMAC generation, etc. It also provides RSA key generation and encryption/decryption, ECDSA key pair generation, symmetric encryption/decryption, JWT encoding/decoding, CSR certificate signing request generation, etc.
Data Format Conversion
Supports mutual conversion between JSON and YAML, CSV, TOML, TOON, and other formats, XML/JSON conversion, JSON sorting, escaping, comparison, parsing, and generating JSON Schema from JSON.
Network Tools
Includes URL parsing, browser information detection, subnet mask calculation (IPv4/IPv6), HTTP status code lookup, IP address and number conversion, XPath testing, WebSocket connection testing, HTTP header viewing, port scanning, SSL certificate lookup, DNS record lookup, IP reverse lookup, WHOIS lookup, etc.
Front-end Development
Provides JS formatting/minification, JS bundling compression/decompression, HTML formatting, CSS formatting/minification, XML formatting, JavaScript obfuscation, SQL formatting, color value conversion, color palettes, color picker, keyboard key detection, SVG path editing, etc. It also includes a variety of chart generators (scatter plot, bar chart, radar chart, pie chart, calendar pie chart, line chart, heatmap, 3D bar chart, donut chart, flow chart) as well as a doodle drawing board, unit conversion (px/em), etc.
Back-end Development
Provides random number generation, serial number generation, GUID/UUID generation, Chmod permission calculation, Cron expression generation, and online runners for multiple languages, including PHP, C, C++, C#, Go, Java, JavaScript, Kotlin, Node.js, Python, Python2,Ruby, Rust, Swift, TypeScript, Objective-C, Scala, Perl, Lua, Haskell, R, Dart, Julia, Elixir, Erlang, F#, Groovy, Shell, SQLite, etc.
Conversion Tools
Includes calorie unit conversion, Unix timestamp conversion, date calculation, base conversion, world clock, area/speed/pressure/power/length/volume/temperature/weight/density unit conversion, map coordinate system conversion, latitude and longitude coordinate conversion, time unit conversion, as well as ZIP compression/decompression and converting archives to ZIP, RAR, 7Z, TAR, etc.
Multimedia Tools
Provides video recording, screen recording, screenshots, audio recording, MP3 volume adjustment, audio format conversion (OGG, MP3, WAV, FLAC, AAC, M4A), audio trimming, audio compression, as well as video to MP4/GIF, video compression, video trimming, extracting audio from video, adding/removing video watermarks, video aspect ratio adjustment, video flipping, speed adjustment, muting, video format conversion (AVI, MKV, WebM, MOV, TS, M4V, MPG), etc.
Image Tools
Includes image text recognition (OCR), image background removal, image color picker, GIF animation creation, image cropping, convert to circle, image watermarking, Favicon generation, image grid splitting, image compression, image Base64 conversion, image generator, rotate and flip, batch resizing, as well as conversion between various image formats (TGA, XBM, BMP, AVIF, GIF, TIFF, PNG, JPG, WebP) and metadata removal.
Document Tools
Provides Markdown editor, Mermaid editor, PlantUML editor, mind map editor, EPUB to PDF/MOBI/AZW3/DOCX/HTML, Word/XLSX/PPT/WPS/image/TXT to PDF, PDF to JPG/WORD/EPUB/MOBI, PDF merging, encryption, password removal, compression, text recognition (OCR).
Text Tools
Includes summing a list of numbers, list sorting, word count, full-width/half-width conversion, letter case conversion, removing duplicate lines, variable naming conversion, counting string occurrences, text column selection, text comparison, text replacement.
Other Tools
Provides QR code generator, barcode generator, QR code/barcode recognition, currency conversion, child blood type calculation, online BMI calculation, stopwatch timer, global phone number generation, regular expression testing, 24-point game generation and solving, Emoji collection, constellation lookup, password generator, online calculator, IP address lookup, IP information lookup, factorization of higher-degree polynomials, special number recognition, large integer factorization, pi generation, volume calculation, greatest common divisor and least common multiple calculation, congruence equation solving, equation solving, rational approximation/continued fraction expansion, Euler's totient function and divisor function calculation, primality testing (Miller-Rabin), extended Euclidean algorithm, etc.
All tools can be used directly on the web page without installation, covering various scenarios such as development, operations and maintenance, and daily office work.
