💻 Developer Tools
21 tools
JSON Formatter
Free Online JSON Formatter & Validator
Free online JSON formatter and validator. Beautify, minify, and validate JSON data with syntax highlighting and instant error detection.
JWT Debugger
Free Online JWT Decoder & Debugger
Free online JWT debugger. Decode, encode, and verify JSON Web Tokens. Inspect header, payload, and signature without sending data to a server.
Text Case Converter
Uppercase, Lowercase, CamelCase & More
Free online text case converter. Transform text between uppercase, lowercase, camelCase, snake_case, kebab-case, PascalCase, and more instantly.
Base64 Text Decoder
Free Online Base64 Text Decoder
Free online Base64 text decoder. Decode Base64 encoded strings to plain text instantly. Supports standard and URL-safe Base64 variants.
Base64 Text Encoder
Free Online Base64 Text Encoder
Free online Base64 text encoder. Encode plain text to Base64 strings instantly. Supports standard and URL-safe Base64 output formats.
UUID Generator
Free Online UUID v4 / v7 Generator
Free online UUID generator. Generate RFC 4122 compliant UUID v4 and v7 identifiers instantly. Batch generation and one-click copy supported.
Base Converter
HEX/DEC/BIN Conversion
Convert numbers between HEX, DEC, OCT, and BIN formats.
Checksum Calculator
CRC16 & Checksum
Calculate CRC16 (MODBUS, CCITT, IBM) and 8/16-bit checksum for ASCII text or HEX bytes. Used for serial communication, protocol verification.
CRC Calculator
All CRC Algorithms
Calculate CRC-8, CRC-16 (MODBUS, CCITT, XMODEM, KERMIT, DNP, IBM, USB…) and CRC-32 checksums for HEX bytes or ASCII text. All common CRC algorithms in one tool.
Hex Arithmetic
HEX +−×÷
Perform addition, subtraction, multiplication and division on hexadecimal numbers. Supports 8/16/32/64-bit result width.
Text Statistics
Word & Char Count
Count characters, words, lines, sentences, bytes (UTF-8/UTF-16) and more in any text. Real-time statistics.
Text Processor
Split / Join / Wrap
Split, join, wrap, add prefix/suffix, and clean text lines. Handles comma-separated values, newlines and custom delimiters.
File Size Converter
Bit, Byte, KB, MB, GB, TB Converter
Free online file size converter. Instantly convert between Bit, Byte, KB, MB, GB, TB, and PB. Essential for developers and system administrators.
Chinese to Pinyin
Hanzi to Pinyin Romanization Converter
Free online Chinese to Pinyin converter. Convert Hanzi to Pinyin with tone marks or numbers. Supports Simplified and Traditional Chinese.
Color Converter
HEX, RGB, HSL Color Converter
Free online color converter. Convert colors between HEX, RGB, HSL, and RGBA formats with live preview. Perfect for web designers and CSS developers.
URL Encoder
Free Online URL Percent-Encoder
Free online URL encoder. Percent-encode strings for safe use in URLs and query parameters. Supports full URI and component encoding modes.
URL Decoder
Free Online URL Percent-Decoder
Free online URL decoder. Decode percent-encoded URL strings back to readable text instantly. Supports full URI and component decoding modes.
Timestamp Converter
Unix Timestamp Conversion
Convert between Unix timestamps and human-readable dates.
Regex Tester
Regex Pattern Tester
Test and debug regular expressions with live matching.
OG Image Generator
1200×630 Open Graph & Twitter Card Image
Generate 1200×630 Open Graph images for your website. Customize title, description, colors, and logo — download PNG instantly.
RSA Encrypt & Decrypt
Public Key Encrypt · Private Key Decrypt · PEM Format · Browser-Only
Online RSA encryption and decryption tool. Generate RSA key pairs (1024/2048/4096 bit), encrypt plaintext with a public key, and decrypt ciphertext with a private key. Supports PEM format. Runs entirely in your browser — no data is sent to any server.