Developer Tools

Cookie Parser & Decoder

Cookie Parser & Decoder Paste any Cookie or Set-Cookie header to instantly parse it into structured, readable data. Identifies all cookie attributes, URL-decodes values, flags security issues, and exports results as JSON. How to Use Paste a Cookie header (semicolon-separated key=value pairs) or one or more Set-Cookie headers (one per line) into the input field. ...

Security Headers Checker

Security Headers Checker Paste HTTP response headers to instantly analyze your site’s security posture. Checks all critical security headers, assigns an overall grade from A+ to F, and provides actionable fix recommendations with server configuration examples. How to Use Paste your HTTP response headers (key: value format, one per line) into the input field. The ...

Robots.txt Tester

Robots.txt Tester Paste your robots.txt file and test whether specific URLs are allowed or blocked for any crawler. Validates syntax against RFC 9309, highlights errors, and extracts sitemap references. How to Use Paste your robots.txt content into the input field, enter a URL path to test, and select a User-agent. The tool instantly shows whether ...

HTTP Header Analyzer

HTTP Header Analyzer Paste any HTTP request or response headers for instant analysis. Categorizes headers by type, explains each header’s purpose, validates CORS and caching configurations, flags deprecated headers, and provides performance optimization suggestions. How to Use Paste HTTP headers (key: value format, one per line) into the input field. The tool automatically parses, categorizes, ...

User-Agent String Parser

User-Agent String Parser Paste any User-Agent string to instantly identify the browser, operating system, device type, rendering engine, and platform. Detects bots, supports batch parsing, and exports results as JSON or CSV. How to Use Paste a User-Agent string into the input field for instant analysis. Use the “Detect Mine” button to analyze your current ...

Terraform (.tf) Formatter

GraphQL Schema Formatter (SDL)

GraphQL Schema Formatter Format and validate your GraphQL Schema Definition Language (SDL) with consistent indentation, proper styling, and syntax highlighting. Paste your schema or upload a .graphql file to instantly clean up type definitions, queries, mutations, and directives. How to Use Paste your GraphQL SDL schema into the input area or upload a .graphql/.gql file. ...

Code Syntax Highlighter

Code Syntax Highlighter Paste code in any of 100+ programming languages and get instant, beautifully syntax-highlighted output. Choose from 20 popular themes, toggle line numbers, highlight specific lines, and export as embeddable HTML with inline CSS. How to Use Paste or type your code in the editor. Select the programming language (or use auto-detect) and ...

File Hash Calculator

File Hash Calculator Calculate MD5, SHA-1, SHA-256, SHA-512, and SHA-3 checksums for any file — entirely in your browser. Verify file integrity by comparing hashes, process multiple files in batch mode, and handle files up to 2GB with chunked streaming. How to Use Drag and drop a file (or click to browse), select which hash ...

Text to Speech Generator

Text to Speech Generator Convert any text to spoken audio using your browser’s built-in speech synthesis. Choose from dozens of voices and languages, adjust speed, pitch, and volume, and hear your text read aloud — all without uploading anything to a server. How to Use Type or paste your text, select a voice and language ...

Git Conflict Marker Remover

Git Conflict Marker Remover Resolve git merge conflicts quickly without an IDE. Paste code with conflict markers, choose which version to keep for each conflict, and get clean output — ready to commit. How to Use Paste your file containing git conflict markers (>). The tool detects and highlights each conflict. For each one, choose ...

Network Mask Calculator

Network Mask Calculator Calculate subnet details from any IP address and CIDR notation or subnet mask. Get network address, broadcast address, usable IP range, wildcard mask, and binary representations — instantly in your browser. How to Use Enter an IP address with CIDR notation (e.g., 192.168.1.0/24) or a subnet mask. Results calculate in real time ...

IPv6 Address Expander / Compressor

IPv6 Address Expander / Compressor Expand compressed IPv6 addresses to full 128-bit notation, or compress expanded addresses to their shortest valid form following RFC 5952 canonical rules. Validate, convert, and inspect IPv6 addresses — all client-side. How to Use Enter an IPv6 address in any format — compressed (2001:db8::1) or expanded. The tool instantly shows ...

TCP/UDP Port Lookup

TCP/UDP Port Lookup Look up TCP and UDP port numbers to find their associated service names, or search by service name to discover which ports they use. Powered by the official IANA Service Name and Transport Protocol Port Number Registry. How to Use Enter a port number (1-65535) or service name in the search field. ...

Webhook Payload Inspector

Webhook Payload Inspector Paste any webhook payload to instantly parse, pretty-print, and inspect its structure. Supports JSON, XML, and URL-encoded form data with automatic format detection, HMAC signature validation, and example payloads from popular providers. How to Use Paste your webhook payload into the input field. The tool auto-detects the format and displays a formatted, ...

IEEE 754 Floating Point Converter

IEEE 754 Floating Point Converter Explore how computers represent decimal numbers in binary with this interactive IEEE 754 converter. Enter any decimal number and instantly see its binary representation broken down into sign, exponent, and mantissa components. How to Use 1. Enter a decimal number in the input field (e.g., 3.14, -0.1, 255). 2. Select ...

ASN.1 Parser

ASN.1 Parser Decode and inspect ASN.1 (Abstract Syntax Notation One) encoded data used in X.509 certificates, PKCS structures, and cryptographic protocols. Paste hex, base64, or PEM-encoded data and instantly see the full parsed structure. How to Use 1. Paste your ASN.1 data in hex, base64, or PEM format into the input field. 2. The parser ...

Gzip / Zlib / Deflate Tester

Gzip / Zlib / Deflate Tester Compress and decompress data using gzip, zlib, and raw deflate formats directly in your browser. Test compression output, verify data integrity, and measure size savings — all client-side with no data leaving your machine. How to Use 1. Choose your mode: Compress or Decompress. 2. For compression: paste text ...

CBOR Encoder / Decoder

CBOR Encoder / Decoder Encode JSON to CBOR and decode CBOR back to JSON — fully client-side. CBOR (Concise Binary Object Representation) is a compact binary data format defined in RFC 8949, widely used in IoT, WebAuthn, and COSE protocols. How to Use Switch between Decode and Encode modes. To decode, paste CBOR data as ...

File Extension Lookup

File Extension Lookup Instantly identify any file type by its extension. Search a database of 500+ file extensions to find descriptions, MIME types, and which programs open them on Windows, macOS, and Linux. How to Use Type a file extension (like .docx or .mp4), a MIME type, or a keyword (like “video” or “image”) into ...