Dev Tools
Encoding and crypto tools: Base64, JSON and URL encode/decode, hash generators, encryption and decryption, regex testers, code formatters and validators.
Encode & Decode
ASCII Converter: Encode, Decode & View ASCII Table
ASCII converter online: encode text to ASCII codes, decode ASCII back, and browse the full ASCII table with control characters.
Base64 Encoder/Decoder: Encode & Decode Text Online
Base64 encoder and decoder online: encode and decode text and files with full UTF-8 support and copy-ready output for data transfer.
Text to Binary Converter: Encode & Decode Binary Online
Text to binary converter online: encode text to binary and decode binary back with UTF-8 support, ideal for learning and debugging.
Charset Detector: Detect File Encoding & Fix Garbled Text
Charset detector online: detect the real encoding of garbled text and files, then fix mojibake with one-click re-encoding.
Hex to Text Converter: Encode & Decode Hexadecimal Online
Hex to text converter online: encode text to hexadecimal and decode hex back with UTF-8 support for debugging and data work.
HTML Entity Encoder: Escape Special Characters Online
HTML entity encoder online: escape special characters like angle brackets and ampersands into entities to prevent XSS and display raw code safely.
Image to Base64: Convert JPG, PNG & WebP to Base64 Online
Image to Base64 converter online: turn JPG, PNG, and WebP into data URLs for HTML, CSS, or JSON. Drag-and-drop to convert instantly.
JWT Decoder Online: Decode & Debug JSON Web Tokens
JWT decoder online: decode and debug JSON Web Tokens with header, payload, and signature inspection for OAuth and SSO flows.
Morse Code Converter: Encode & Decode Morse Online
Morse code converter online: encode text to Morse and decode Morse back instantly, with copy-ready output for easy learning.
Number Base Converter: Binary, Octal, Decimal, Hex
Number base converter online: integer conversions between binary, octal, decimal, and hexadecimal, with all four results shown at once.
Roman Numeral Converter: Roman & Arabic Numbers 1-3999
Roman numeral converter online: convert Roman numerals to Arabic numbers and back (1-3999), with format validation and one-click copy.
Unicode Converter: Encode, Decode & Look Up Characters
Unicode converter online: encode and decode text to Unicode code points, and look up character information and categories.
URL Encoder/Decoder: Percent Encoding & Decoding Online
URL encoder and decoder online: percent-encode and decode text with UTF-8 support, including full URL and query string modes.
Hash & Cryptography
Adler-32 Checksum: zlib & PNG Fast Integrity Check
Adler-32 checksum calculator online: the fast 32-bit integrity check used by zlib and PNG, faster than CRC32 but weaker error detection.
Bcrypt Password Hash Generator: Online Hash & Verify Tool
Generate bcrypt password hashes with adjustable cost factor, and verify passwords against existing hashes. Industry-standard for secure storage.
BLAKE2b-256 Hash: Faster Than MD5, Secure as SHA-3
BLAKE2b-256 hash calculator online: compute 256-bit hashes faster than MD5 with SHA-3 level security, optimized for 64-bit platforms.
BLAKE2b-512 Hash: 512-bit High-Speed BLAKE2 Hash Online
BLAKE2b-512 hash calculator online: full 512-bit output with SHA-512 equivalent security, about 3x faster than SHA-512 on 64-bit CPUs.
BLAKE2s-256 Hash: Embedded & IoT Optimized Hash Tool
BLAKE2s-256 hash calculator online: compute 256-bit hashes for embedded systems, 32-bit ARM processors, IoT sensors, and Raspberry Pi.
BLAKE3 Hash: Fastest Merkle Tree Hash (10x SHA-256)
BLAKE3 hash calculator online: compute the high-speed 256-bit hash of text or files in your browser, ideal for checksums and data integrity checks.
CRC32 Checksum: ZIP/Gzip Data Integrity Checker Tool
CRC32 checksum calculator online: 32-bit cyclic redundancy check for ZIP, Gzip, and PNG integrity. Fast, but not cryptographic: no tamper resistance.
Hash Calculator: MD5, SHA-256 & 25+ Algorithms Online
Hash calculator online: generate MD5, SHA-1, SHA-256, and 25+ algorithms from pasted text, with HMAC support for integrity checks.
Keccak-256 Hash: Ethereum Smart Contract Hash Online
Keccak-256 hash calculator online: Ethereum's native hashing engine for smart contracts, using original Keccak padding instead of SHA3-256.
Keccak-512 Hash: Full Original Keccak Output Online
Full 512-bit output of the original Keccak algorithm. Used in blockchain projects requiring high-security hashing with pre-NIST padding.
MD2 Hash Generator: Legacy RFC 1319 Checksum Online
MD2 hash calculator: RFC 1319's early 128-bit cryptographic hash, broken by collision attacks. For legacy system compatibility and academic research only.
MD4 Hash Generator: Early Merkle-Damgård Checksum Tool
MD4 hash calculator: MD5's direct predecessor with 128-bit output. Broken by collision attacks; use only for legacy interoperability, never for security.
MD5 Hash Calculator: Online Generator & Checksum Verifier
MD5 hash calculator online: compute 128-bit checksums for file integrity, database indexing, and download verification. Note: cryptographically broken.
Password Strength Checker: Test Password Security Online
Password strength checker online: test password security with entropy scoring, common pattern detection, and improvement tips.
RIPEMD-160 Hash Generator: Bitcoin Address Core Hash
RIPEMD-160 hash generator online: compute the 160-bit hash behind Bitcoin address generation (P2PKH), also used in PGP/GPG signatures. 80-bit security level.
SHA1 Hash Generator: Online SHA-1 Checksum Calculator
SHA-1 hash calculator online: compute 160-bit hashes broken by the SHAttered collision attack and deprecated by all major browsers. Legacy Git use only.
SHA-224 Hash Calculator: 224-bit SHA-2 Generator Online
SHA-224 hash calculator online: a truncated SHA-256 variant producing 224-bit hashes for TLS and IPsec. 112-bit security level.
SHA-256 Hash Calculator: Bitcoin & HTTPS Standard Hash
SHA-256 hash calculator online: the global industry standard powering Bitcoin and HTTPS certificates, with 256-bit output and 128-bit security.
SHA3-224 Hash Generator: Keccak Sponge Algorithm Online
SHA3-224 hash generator online: FIPS 202 Keccak sponge with 224-bit output, immune to length-extension attacks and structurally independent from SHA-2.
SHA3-256 Hash Calculator: NIST 3rd Gen Keccak Standard
SHA3-256 hash calculator online: NIST's third-generation Keccak sponge standard with 256-bit output, sharing zero code with SHA-2 for cryptographic diversity.
SHA3-384 Hash Generator: Post-Quantum Keccak Hash Online
SHA3-384 hash generator online: Keccak sponge 384-bit output with 192-bit security, a post-quantum alternative to SHA-384.
SHA3-512 Hash Calculator: Maximum Keccak Sponge Output
SHA3-512 hash calculator online: the largest SHA-3 variant at 512 bits, a NIST-recommended Keccak alternative to SHA-512.
SHA-384 Hash Generator: FIPS Government Security Tool
SHA-384 hash generator online: truncated SHA-512 with 384-bit output, FIPS-approved for government and military applications.
SHA-512 Hash Calculator: 512-bit Maximum Security Hash
SHA-512 hash calculator online: the highest-output SHA-2 variant at 512 bits, paradoxically faster than SHA-256 on 64-bit CPUs, with 256-bit security.
SM2 Encryption: Chinese Asymmetric Crypto Tool Online
SM2 elliptic curve cryptography tool for key generation, encryption, decryption, and digital signatures. Supports C1C3C2 and C1C2C3 modes.
SM3 Hash Calculator: Chinese National Crypto Standard
SM3 hash calculator online: China's national cryptographic hash standard GM/T 0004-2012 with 256-bit output, mandatory for government agencies.
SM4 Encryption: Chinese Symmetric Cipher Tool Online
SM4 encryption online: Chinese national symmetric block cipher (GM/T 0002) with ECB and CBC modes for key generation, encryption, and decryption.
Whirlpool Hash Generator: AES-Based 512-bit ISO Standard
Whirlpool hash calculator online: compute 512-bit AES-based hashes (ISO/IEC 10118-3) with instant hex output, checksum verification, and comparison.
xxHash32 Hash Generator: Ultra-Fast Database Index Hash
xxHash32 hash calculator online: compute 32-bit hashes at RAM speed for PostgreSQL and Cassandra hash indexing, with instant hex output and verification.
xxHash64 Hash Calculator: GB/s Throughput Dedup Online
xxHash64 hash calculator online: 64-bit hashes at GB/s speeds for ZFS deduplication and database hash tables, with instant hex output and verification.
Formatters & Validators
Code Beautifier: Format HTML, CSS & JavaScript Online
Code beautifier online: format HTML, CSS, and JavaScript with indentation, line breaks, and configurable style rules for clean readable code.
Code Minifier: Minify HTML, CSS & JavaScript Online
Code minifier online: minify HTML, CSS, and JavaScript to reduce file size, with safe compression options for production use.
CSS Unit Converter: px, rem, em, vw, vh & Percent Online
CSS unit converter online: convert px, rem, em, vw, vh, and percent with custom root font size and viewport settings for responsive design.
CSV to JSON Converter: Convert CSV to JSON Online Instantly
CSV to JSON converter online: convert CSV files with custom delimiters and headers into clean JSON for APIs and apps, with nested object support.
JSON Diff: Compare Two JSON Files Online & Find Changes
JSON diff online: compare two JSON files side by side, highlight added, removed, and changed values, and copy the result.
JSON Formatter: Beautify, Validate & Minify JSON Online
JSON formatter and validator online: beautify, minify, and validate JSON with syntax highlighting, error messages, and tree view.
JSONPath Tester: Test Expressions & Debug Results Online
JSONPath tester online: test and debug JSONPath expressions with live match highlighting, query results, and syntax error feedback.
JSON Schema Generator: Create Schemas from JSON Data
JSON Schema generator online: create JSON Schema from sample JSON data with type inference, nesting support, and validation-ready output.
JSON to CSV Converter: Convert JSON Arrays to CSV Instantly
JSON to CSV converter online: turn JSON arrays and nested objects into CSV with custom delimiters, ready for Excel and Sheets.
JSON to YAML: Convert JSON to YAML for Docker & K8s
JSON to YAML converter online: convert JSON into YAML for Docker Compose, Kubernetes manifests, and API configuration files.
Regex Tester Online: Test JavaScript Regular Expressions
Regex tester online: test JavaScript regular expressions with live matches, group capture, and syntax error highlighting.
SQL Formatter: MySQL, PostgreSQL & SQL Server Beautifier
SQL formatter online: beautify MySQL, PostgreSQL, and SQL Server queries with keyword highlighting and indentation control.
XML Formatter: Beautify, Validate & Minify XML Online
XML formatter online: beautify, validate, and minify XML with indentation control, error line reporting, and online validation.
XML to JSON Converter: XML Files to JSON Instantly
XML to JSON converter online: transform XML documents and API responses into JSON with attribute and array handling for clean output.
YAML to JSON: Convert Docker/K8s Config Files Online
YAML to JSON converter online: convert Docker and Kubernetes config files into valid JSON for tools and APIs, with nested mapping support.
Dev Generators
Alt Text Generator: Image Accessibility & WCAG Descriptions
Alt text generator for images: create WCAG-compliant alt text with context, keywords, and SEO-friendly descriptions for accessibility.
Cron Generator: Build Linux Crontab Schedule Online
Cron generator online: build standard 5-field Linux crontab expressions with visual dropdowns, presets, and next-run previews.
Docker Compose to Run: Convert compose.yml to docker run
Docker Compose to docker run converter online: turn compose.yml services into equivalent docker run commands with ports and volumes.
Docker Run to Compose: Convert docker run to compose.yml
Docker run to Compose converter online: generate compose.yml from docker run commands with ports, volumes, and environment variables.
RSA/ECDSA Key Generator: PEM Keys for SSH, TLS & JWT
Generate RSA and ECDSA key pairs online for SSH, TLS, JWT, and OpenSSL. Export as PEM with selectable key sizes and curves.
Password Generator: Strong Random Passwords 12-64 Chars
Password generator online: create strong random passwords from 12 to 64 characters with custom character sets and Web Crypto randomness.
Timestamp Converter: Unix Epoch to Date & Time Online
Timestamp converter online: convert Unix epoch seconds and milliseconds to human-readable dates, with full timezone support.
UUID Generator: v4 & All Versions, Validate & Decode Online
UUID generator online: create v1, v4, and v7 UUIDs in bulk, validate any UUID, and decode version and variant information.
Network Tools
DNS Lookup: All 16 Record Types (A, AAAA, MX, SRV)
DNS lookup tool online: query all 16 record types including A, AAAA, MX, TXT, and SRV via DoH resolvers, with response times.
HTTP Headers Viewer: Analyze & Audit Response Headers
HTTP headers viewer online: inspect request and response headers with detailed security analysis for caching, CORS, and cookies.
IP Address Lookup: Online Geolocation, ISP & ASN Info
IP address lookup online: find geolocation, ISP, ASN, timezone, and coordinates for any IPv4 or IPv6 address, with map view.
Ping & Traceroute: Test Network Latency & Server Uptime
Ping and traceroute test online: measure latency, packet loss, and routing hops to diagnose slow connections and server issues.
Port Scanner Online: Check Open Ports & Common Services
Port scanner online: check which ports are open on a host and which common services use them. Includes security alerts for exposed sensitive ports.
SSL/TLS Certificate Checker: Verify & Analyze Online
SSL certificate checker online: verify expiry, issuer, key strength, and chain validity from certificate files or pasted PEM, with expiration alerts.
Subnet Calculator: CIDR/IPv4 Range & Host Calculator Online
Subnet calculator online: calculate CIDR notation, IP ranges, subnet masks, and usable hosts for IPv4 networks, with classful breakdown.
VPN Leak Test: WebRTC & DNS Leak Checker for Privacy
VPN leak test online: detect WebRTC IP leaks in your browser, compare your public and local IPs, and check whether your VPN hides your real address.
WHOIS Lookup: Domain, IP, ASN & RDAP Lookup Online
WHOIS lookup online: query domain registration, IP ownership, ASN, nameservers, and DNSSEC via RDAP, with raw and parsed views for research.
SEO & Content Tools
Meta Tag Generator: Create SEO Title & Description Online
Meta tag generator online: create SEO title, description, and Open Graph tags with live character count for search engines.
Robots.txt Generator: Create & Test Crawler Rules Online
Robots.txt generator online: create robots.txt rules with user agents, allow and disallow paths, crawl delay, and sitemap.
Schema Markup Generator: Create JSON-LD for SEO Online
Schema markup generator online: build JSON-LD structured data for articles, products, FAQs, and reviews with Rich Results support.
XML Sitemap Generator: Create Sitemaps for Google Online
XML sitemap generator online: create sitemaps with priority, change frequency, and lastmod for Google and Bing submission.
URL Slug Generator: Create SEO-Friendly URL Slugs Online
URL slug generator online: convert titles and text into clean SEO-friendly slugs with lowercase, hyphenation, and character removal.