Developer Tools
JSON, Base64, JWT, regex, hashing, and other everyday dev utilities.
JSON Formatter & Validator
Format, validate, and minify JSON instantly in your browser.
XML Formatter & Validator
Format, validate, and minify XML instantly in your browser.
UUID Generator
Generate random, cryptographically secure UUID v4 identifiers in bulk.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to plain text, with full unicode support.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.
URL Encoder & Decoder
Percent-encode or decode URLs and query string parameters instantly.
URL Decoder
Decode percent-encoded URLs and query strings back to readable text.
HTML Encoder & Decoder
Escape text to safe HTML entities, or decode HTML entities back to plain text.
Password Generator
Generate strong, random passwords with customizable length and character sets.
Slug Generator
Convert any title or sentence into a clean, URL-safe slug.
JWT Decoder
Decode a JSON Web Token's header and payload to inspect its claims.
JWT Encoder
Create a signed HS256 JSON Web Token from a JSON payload and secret.
Regex Tester
Test regular expressions against sample text with live match highlighting.
Diff Checker
Compare two blocks of text and see exactly what changed, line by line.
Lorem Ipsum Generator
Generate placeholder text by word, sentence, or paragraph count.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back, instantly.
Cron Expression Parser
Decode a cron expression into plain English and see its next 5 run times.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal.
JSON to CSV Converter
Convert a JSON array of objects into CSV with a header row.
CSV to JSON Converter
Convert CSV data with headers into a JSON array of objects.
CSS Minifier
Minify CSS by stripping comments, whitespace and empty rules.
JSON Minifier
Minify JSON to a single compact line, validating it along the way.
ULID Generator
Generate sortable ULIDs and decode the timestamp inside any ULID.
Base32 Encoder / Decoder
Encode text to Base32 and decode Base32 back to text (RFC 4648).
Subnet Calculator
Calculate network, broadcast, host range and mask for any IPv4 CIDR.
HTTP Status Codes
Search and reference every HTTP status code with plain-English meanings.
MIME Type Lookup
Look up the MIME type for any file extension, or find extensions for a MIME type.
Text to Binary Converter
Convert text to binary (and binary back to text) using UTF-8 bytes.
JSON Escape / Unescape
Escape text into a JSON string literal, or unescape a JSON string back to text.
Query String Parser
Parse a URL query string into readable key-value pairs and JSON.
SQL Minifier
Compress SQL onto one line, stripping comments and extra whitespace.
ASCII Table
Searchable ASCII table with decimal, hex and character for all 128 codes.
JSON Sort Keys
Alphabetically sort the keys of a JSON object, recursively and deeply.
JSON to TypeScript
Generate TypeScript interfaces from a JSON object or API response.
Chmod Calculator
Build Unix file permissions and get the octal and symbolic chmod values.
Base58 Encoder / Decoder
Encode and decode Base58 text — the format used by Bitcoin and IPFS.
XML to JSON Converter
Convert XML into readable JSON, handling attributes and nested elements.
CSV to Markdown Table
Convert CSV data into a formatted Markdown table.
HTML Minifier
Minify HTML by removing comments and collapsing whitespace.
JSON to XML Converter
Convert a JSON object into formatted XML.
Text to Hex Converter
Convert text to hexadecimal and hex back to text using UTF-8.
Base64URL Encoder / Decoder
Encode and decode URL-safe Base64 (Base64URL) used in JWTs and URLs.
Random MAC Address Generator
Generate random, valid MAC addresses in your choice of format.
Random IP Address Generator
Generate random IPv4 and IPv6 addresses for testing.
Every developer keeps a mental list of small tasks that don't belong in an IDE but come up constantly — formatting a blob of JSON someone pasted in Slack, decoding a JWT to check its claims, generating a UUID, or testing a regex against a handful of strings. Our developer tools are built to answer exactly that need: instant, client-side, no sign-up, no data leaving your browser for anything that doesn't require a server. Each tool is intentionally narrow and fast rather than a bloated all-in-one IDE substitute, so you can bookmark the one you use daily and get in and out in seconds.