Developer & Webmaster Tools
Essential utilities for developers including formatters, encoders, validators, and network tools.
Formatters & Encoders
Base64 Encode / Decode
Base64 encoder and decoder. Encode text to Base64 or decode Base64 back to readable text with real-time auto-detection. Supports UTF-8 characters including emojis, Chinese, and other non-Latin scripts. Features include drag-and-drop file upload, one-click copy, and download results as text files. All processing runs locally in your browser — your data never leaves your device.
HTML Entity Encoder / Decoder
HTML entity encoder and decoder. Encode special characters (< > & " ') to HTML entities or decode entities back to readable text. Prevents XSS attacks and broken markup when displaying user-generated content or code snippets. Supports named entities, decimal (&), and hex (&) numeric references. Features include encode-all-non-ASCII option, drag-and-drop file upload, one-click copy, and download results as text files. All processing runs locally in your browser — your data never leaves your device.
JSON Formatter
JSON formatter, validator, and beautifier. Format, minify, pretty-print, and syntax-highlight JSON data instantly. Features include key sorting, custom indentation (2/4 spaces or tab), line numbers, tree view, error highlighting with line/column position, drag-and-drop file upload, one-click copy/download. All processing runs locally in your browser — no server uploads.
JSON to CSV Converter
JSON to CSV converter. Convert JSON arrays or objects to CSV format instantly with automatic flattening of nested structures using dot notation. Supports custom delimiters (comma, semicolon, tab), header options, and handles complex nested data including objects and arrays. Download results as .csv files compatible with Excel, Google Sheets, and any spreadsheet application. All processing runs locally in your browser — no server uploads required.
JWT Parser
JWT parser and debugger. Decode JSON Web Tokens instantly — view header, payload, and signature in readable format. Inspect registered claims (exp, iat, nbf, iss, sub, aud) with human-readable timestamps. Detects expired tokens, missing expiration, weak algorithms, and alg:none security issues. All processing runs locally in your browser — your tokens never leave your device.
Markdown Editor
Online Markdown editor with live preview. Write and preview Markdown in real-time with split-pane view. Supports headings, bold, italic, links, images, code blocks, tables, lists, and GitHub Flavored Markdown. Features include view mode toggle (edit/preview/split), one-click copy HTML, download as .md or .html, drag-and-drop file upload, toolbar shortcuts, and word/character count. All rendering happens locally in your browser using the marked library — no data is sent to any server.
SQL Formatter
Free online SQL formatter, beautifier, and minifier. Format and beautify SQL queries for MySQL, PostgreSQL, SQL Server, Oracle, SQLite, and 15+ dialects instantly. Features include keyword case conversion (UPPER/lower/Capitalize), custom indentation (2/4 spaces or tab), syntax highlighting with color-coded keywords, instant minification for production, real-time formatting as you type, drag-and-drop file upload, error detection with line positioning, and one-click copy/download. All processing runs locally in your browser — no server uploads.
URL Encode / Decode
URL encoder and decoder. Encode text to URL-safe percent encoding or decode percent-encoded URLs back to readable text. Supports UTF-8 characters including emojis, Chinese, and other Unicode scripts. Features include spaces-as-plus encoding for form data, uppercase hex option, drag-and-drop file upload, one-click copy, and download results as text files. All processing runs locally in your browser — your data never leaves your device.
XML Formatter
Free online XML formatter, beautifier, and minifier. Format and beautify XML documents with custom indentation options (2/4 spaces or tab). Features include syntax highlighting with color-coded tags and attributes, instant minification for production use, real-time formatting as you type, drag-and-drop file upload (.xml), error detection with line positioning, one-click copy/download, and support for XML comments, CDATA sections, and processing instructions. All processing runs locally in your browser — no server uploads.
YAML to JSON Converter
YAML to JSON and JSON to YAML converter. Transform YAML configuration files (Docker Compose, Kubernetes, CI/CD pipelines) to JSON format with real-time validation, syntax error detection, and precise line/column position. Supports YAML 1.2 features including anchors, aliases, merge keys, multi-line strings, and custom tags. Features include bidirectional conversion, customizable indentation (2/4 spaces), line numbers, drag-and-drop file upload (.yaml/.yml), one-click copy/download. All processing runs locally in your browser — no server uploads, perfect for sensitive config files.
Hash Tools
Adler-32 Checksum Generator — zlib Fast Integrity Check
A fast 32-bit checksum used by zlib and PNG images. Faster than CRC32 but weaker at detecting errors — best for quick preliminary integrity screening of large datasets.
BLAKE2b-256 Hash Calculator — Faster Than MD5, Secure as SHA-3
High-speed cryptographic hash optimized for 64-bit platforms, 256-bit output. Faster than MD5 yet as secure as SHA-3. Adopted by Zcash and Decred blockchains.
BLAKE2b-512 Hash Generator — 512-bit High-Speed BLAKE2
Full BLAKE2b output at 512 bits, security equivalent to SHA-512. Runs faster than MD5 on 64-bit CPUs — roughly 3× faster than SHA-512 while matching its security.
BLAKE2s-256 Hash Tool — Optimized for Embedded & IoT
Low-resource hash optimized for embedded systems and 32-bit ARM processors. 256-bit output, ideal for IoT sensors, mobile devices, and Raspberry Pi.
BLAKE3 Hash Calculator — Fastest Merkle Tree Hash (10× SHA-256)
The newest hash algorithm (2020) featuring a Merkle tree architecture for full multithreading. 256-bit default output, up to 10× faster than SHA-256 on modern multi-core CPUs.
CRC32 Checksum Calculator — ZIP/Gzip Data Integrity Tool
32-bit cyclic redundancy check — not cryptographic. The classic data integrity backbone behind ZIP, Gzip, and PNG. Lightning fast but offers zero tamper resistance.
Hash Calculator
Hash calculator supporting 25 algorithms — MD2, MD4, MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3-224, SHA3-256, SHA3-384, SHA3-512, Keccak-256, Keccak-512, BLAKE2b-256, BLAKE2b-512, BLAKE2s-256, BLAKE3, RIPEMD-160, SM3, Whirlpool, CRC32, Adler-32, xxHash32, and xxHash64. Compute hash digests of any text input in real time. Features include HMAC with a secret key, uppercase/lowercase hex output, hash verification against a known checksum, one-click copy, and download results. All hashing runs locally in your browser — your data never leaves your device.
Keccak-256 Hash Tool — Ethereum Smart Contract Hashing
The hashing engine of Ethereum — powers every smart contract transaction and message signature (EIP-191). Uses original Keccak padding, producing different output than SHA3-256.
Keccak-512 Hash Generator — Full Original Keccak Output
The full 512-bit output of the original Keccak algorithm. Used in blockchain projects and cryptographic applications requiring high-security hashing with pre-NIST padding.
MD2 Hash Online — Legacy RFC 1319 Checksum Generator
Early cryptographic hash from RFC 1319 with 128-bit output. Broken by collision attacks — use only for legacy system compatibility and academic research.
MD4 Hash Generator — Early Merkle-Damgård Checksum Tool
MD5 predecessor and early Merkle–Damgård design. 128-bit output, severely compromised. Only exists for legacy interoperability — never use for security.
MD5 Hash Calculator — Free Online MD5 Generator
The most widely deployed hash in computing history. 128-bit output, used everywhere for file checksums, database indexing, and download integrity. Cryptographically broken — do not use for security.
RIPEMD-160 Hash Generator — Bitcoin Address Core Hash
The core hash behind Bitcoin address generation (P2PKH) with 160-bit output. Also used in PGP/GPG signatures. 80-bit security level — irreplaceable in the cryptocurrency ecosystem.
SHA1 Hash Generator — Online SHA-1 Checksum Tool
Once the backbone of internet security, now broken by the SHAttered collision attack. 160-bit output, deprecated by all major browsers. Still found in legacy Git repositories.
SHA-224 Hash Calculator — 224-bit SHA-2 Generator
A truncated SHA-256 variant producing 224-bit hashes. Used in TLS and IPsec protocols where shorter digests are preferred. 112-bit security level.
SHA-256 Hash Calculator — Bitcoin & HTTPS Standard
The global industry standard — powers Bitcoin, HTTPS certificates, and digital signatures worldwide. 256-bit output, 128-bit security. The most trusted SHA-2 variant by far.
SHA-384 Hash Generator — FIPS-Compliant Government Tool
A truncated SHA-512 variant with 384-bit output. FIPS-approved for government and military applications requiring high security margins. 192-bit security level.
SHA3-224 Hash Generator — 224-bit Keccak Sponge Online
FIPS 202 standard based on Keccak sponge construction. 224-bit output, naturally immune to length-extension attacks. Structurally independent from SHA-2.
SHA3-256 Hash Calculator — NIST 3rd Gen Keccak Standard
NIST third-generation hash standard with 256-bit output. Built on the Keccak sponge — shares zero code with SHA-2, providing cryptographic diversity for critical systems.
SHA3-384 Hash Generator — Post-Quantum Ready Keccak Hash
A high-security Keccak sponge variant producing 384-bit hashes. Suitable as a post-quantum alternative to SHA-384 for forward-looking applications.
SHA3-512 Hash Calculator — Maximum Keccak Sponge Output
The largest SHA-3 variant at 512 bits. Keccak-based, NIST-recommended as a cryptographically independent alternative to SHA-512.
SHA-512 Hash Calculator — 512-bit Maximum Security
The highest-output SHA-2 variant at 512 bits. Paradoxically faster than SHA-256 on 64-bit CPUs. 256-bit security level for long-term data protection.
SM3 Hash Calculator — Chinese National Crypto Standard
China national cryptographic hash standard GM/T 0004-2012, 256-bit output. Mandatory for Chinese government agencies, financial institutions, and public security systems.
Whirlpool Hash Generator — AES-Based 512-bit ISO Standard
An AES-like block cipher design producing 512-bit hashes. ISO/IEC 10118-3 international standard. Used in the FreeNet anonymous network. Structurally unrelated to the SHA family.
xxHash32 Hash Generator — Ultra-Fast Database Index Hash
Extremely fast 32-bit non-cryptographic hash approaching RAM bandwidth limits. Used for hash indexing in PostgreSQL, Apache Cassandra, and other high-throughput databases.
xxHash64 Hash Calculator — GB/s Throughput Deduplication Hash
Ultra-high-speed 64-bit non-cryptographic hash with GB/s throughput. Powers ZFS storage deduplication, database hash tables, and high-speed data synchronization.
Generators & Testing
Cron Expression Generator & Parser
Free online cron expression generator and parser. Build, validate, and understand cron schedules visually with our intuitive cron builder. Features include visual field selectors, quick presets for common schedules, human-readable description translation, next execution time preview, and support for standard 5-field Linux cron syntax. Perfect for developers, DevOps engineers, and system administrators scheduling automated tasks.
Password Generator
Free online password generator. Create strong, secure, random passwords with customizable length (8-128 characters) and character sets. Features include cryptographically secure generation using Web Crypto API, real-time strength indicator with entropy calculation, exclude similar characters, memorable passphrase mode, and password history. All processing runs locally in your browser — your passwords never leave your device.
Regex Tester
Free online regex tester and debugger with real-time match highlighting, capture groups visualization, detailed match information (position, length, group content), replacement testing, and JavaScript/PCRE flavor support. Features include flag toggles (global, case-insensitive, multiline, dotAll, Unicode), common regex library (email, URL, phone, IP, date), syntax error detection with clear messages, one-click copy pattern, and instant visual feedback as you type. All processing runs locally in your browser using native RegExp engine — no server uploads, works offline.
UUID / GUID Generator
Generate UUIDs, GUIDs, NanoIDs, and ULIDs online instantly. Create v1 (time-based), v3/v5 (name-based), v4 (random), v6, or v7 (sortable time-ordered) UUIDs with one click. Bulk generate thousands of unique IDs for database seeding and testing. Validate and decode UUIDs to inspect version, variant, and timestamp. Customize output case, hyphens, and braces wrapping. Copy to clipboard or download as text file. All generation uses cryptographically secure random numbers — no data leaves your browser.