All tools
67 client-side tools for everyday developer work. Search or filter by category.
JSON Formatter
Beautify and format JSON with configurable indentation.
JSON Validator
Validate JSON syntax and surface errors with line numbers.
JSON Minifier
Remove whitespace from JSON to reduce payload size.
JSON to YAML
Convert JSON into clean, readable YAML.
YAML to JSON
Convert YAML config into strict JSON.
JSON to CSV
Flatten JSON arrays into CSV rows.
CSV to JSON
Parse CSV and emit clean JSON arrays.
XML to JSON
Convert XML documents into JSON.
TOML to JSON
Convert TOML configuration files into JSON.
JSON Diff
Compare two JSON structures and see what changed.
JSON Path Finder
Click any value in your JSON to copy its path.
Base64 Encode / Decode
Encode text or files to Base64 and decode them back.
URL Encode / Decode
Percent-encode URLs and query parameters, and decode them.
HTML Entity Encode / Decode
Convert HTML entities to characters and back.
JWT Decoder
Decode and inspect JWT header and payload.
JWT Debugger
Decode, verify, and edit JWTs with a signing secret.
Unicode Escape / Unescape
Convert characters to `\uXXXX` escape sequences and back.
Password Generator
Generate strong random passwords with custom rules.
UUID Generator
Generate v4 UUIDs in bulk — up to 100 at a time.
Hash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes.
HMAC Generator
Compute HMAC signatures with a shared secret.
Bcrypt Generator / Checker
Hash passwords with bcrypt and verify existing hashes.
QR Code Generator
Turn any text or URL into a downloadable QR code.
Lorem Ipsum Generator
Generate placeholder text by word, sentence, or paragraph.
Random Number Generator
Generate random numbers with configurable ranges.
Word Counter
Count words, characters, sentences, and reading time.
Case Converter
Convert text between camelCase, snake_case, kebab-case, and more.
Slug Generator
Turn any text into a clean, URL-safe slug.
Text Diff
Compare two blocks of text side-by-side.
Markdown Preview
Live split-pane Markdown editor with HTML preview.
String Escape / Unescape
Escape strings for JSON, HTML, URL, JavaScript, or SQL.
Regex Tester
Test regular expressions with live match highlighting.
Cron Expression Parser
Translate cron expressions into plain English.
CSS Minifier
Minify CSS to reduce file size.
JavaScript Minifier
Minify JavaScript with variable mangling.
SQL Formatter
Format and beautify SQL queries.
HTML Prettifier
Format and indent HTML for readability.
HTTP Status Codes
Searchable reference for every HTTP status code.
Color Converter
Convert between HEX, RGB, HSL, and CMYK.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
Unix Timestamp Converter
Convert Unix timestamps to and from human dates.
Markdown to HTML
Convert Markdown to ready-to-paste HTML.
URL Parser
Break a URL into protocol, host, path, query, and hash.
User Agent Parser
Extract browser, OS, and device from a UA string.
Image to Base64
Convert images into Base64 data URIs.
SVG Optimizer
Remove unused metadata and shrink SVG file size.
Color Palette Generator
Build harmonious palettes from a seed color.
Percentage Calculator
Compute percentages of, from, and between numbers.
Date Difference Calculator
Calculate time between two dates in multiple units.
Byte / Data Size Converter
Convert between B, KB, MB, GB, TB, and PB.
Aspect Ratio Calculator
Solve for width or height given a target aspect ratio.
Text to Binary
Convert text to binary and back, bit by bit.
HEX to RGB
Convert HEX color codes to RGB values and back.
IP Address Inspector
Validate and classify IPv4 and IPv6 addresses.
CSS Gradient Generator
Build CSS gradients visually and copy the code.
Box Shadow Generator
Design CSS box-shadows with a live preview.
chmod Calculator
Toggle Unix permissions and get the numeric chmod value.
VAST Inspector
Parse IAB VAST 2/3/4 XML tags and inspect creatives, tracking pixels, and wrappers.
VMAP Parser
Parse VMAP 1.0 ad-break manifests with pre/mid/post-roll timeline preview.
IAB TCF Consent Decoder
Decode IAB TCF v2.2 consent strings — CMP, vendors, purposes, restrictions.
IAB GPP Decoder
Decode Global Privacy Platform strings — US National, state-specific, TCF EU.
OpenRTB Inspector
Validate & annotate OpenRTB 2.6 BidRequest and BidResponse JSON.
ads.txt / app-ads.txt Validator
Parse ads.txt and app-ads.txt files; detect duplicates, syntax errors, DIRECT vs RESELLER counts.
sellers.json Inspector
Validate a sellers.json file and browse the seller table with search and filters.
HLS m3u8 Parser
Parse HLS master & media playlists — variants, renditions, segments, SCTE-35 ad markers.
WebSocket Tester
Interactive WebSocket client — connect, send text or binary, inspect every message.
MIME Type Lookup
Search IANA MIME types by extension, type, or description — category filters included.