Analyze text
Count characters, words and lines and estimate reading time without sending the text anywhere.
For technical work
Developer tools
Focused utilities for code, data, networks, testing, and the web.
Open all toolsData & formats
Transform and validate structured data.
YAML to JSON Converter
YAML to JSON Converter processes structured input locally with bounded parsing, copy and download.
CSV to JSON Converter
CSV to JSON Converter processes structured input locally with bounded parsing, copy and download.
HTML Encoder and Decoder
HTML Encoder and Decoder processes structured input locally with bounded parsing, copy and download.
JSON to TypeScript
JSON to TypeScript processes structured input locally with bounded parsing, copy and download.
SQL, CSV and JSON Converter
SQL, CSV and JSON Converter processes structured input locally with bounded parsing, copy and download.
Encoding & cryptography
Encode, hash, sign, and inspect secure data.
Convert Base64
Encode Unicode text or local files as Base64 and decode Base64 back to text or a file without uploads.
Morse Code Encoder
Morse Code Encoder runs locally in your browser with bounded input, copy and download.
Morse Code Decoder
Morse Code Decoder runs locally in your browser with bounded input, copy and download.
Character Encoding Converter
Character Encoding Converter runs locally in your browser with bounded input, copy and download.
Unicode Inspector and Normalizer
Unicode Inspector and Normalizer runs locally in your browser with bounded input, copy and download.
String Escape and Unescape
String Escape and Unescape processes structured input locally with bounded parsing, copy and download.
Format & optimize code
Format, minify, and convert source code.
Format and validate JSON
Validate structure, format it clearly, and understand syntax errors at the exact position.
XML Formatter
XML Formatter processes structured input locally with bounded parsing, copy and download.
HTML Formatter
HTML Formatter processes structured input locally with bounded parsing, copy and download.
SQL Formatter
SQL Formatter processes structured input locally with bounded parsing, copy and download.
HTML to Markdown
HTML to Markdown processes structured input locally with bounded parsing, copy and download.
Safe Markdown Preview
Safe Markdown Preview processes structured input locally with bounded parsing, copy and download.
Web, HTTP & SEO
Build and inspect web metadata and requests.
URL Encoder and Decoder
URL Encoder and Decoder runs locally with bounded input and no request to user-entered targets.
HTTP Status Code Reference
HTTP Status Code Reference runs locally with bounded input and no request to user-entered targets.
User-Agent Parser
User-Agent Parser runs locally with bounded input and no request to user-entered targets.
cURL to JavaScript Fetch
cURL to JavaScript Fetch runs locally with bounded input and no request to user-entered targets.
URL Parser and Query Editor
URL Parser and Query Editor runs locally with bounded input and no request to user-entered targets.
Content Security Policy Builder
Content Security Policy Builder runs locally with bounded input and an ephemeral secret lifecycle.
Generators & test data
Generate identifiers, fixtures, and random inputs.
Generate UUIDs
Generate cryptographically secure UUID v4 or time-ordered RFC 9562 UUID v7 values directly in your browser.
Slug Generator
Slug Generator runs locally in your browser with bounded input, copy and download.
Lorem Ipsum Generator
Lorem Ipsum Generator runs locally in your browser with bounded input, copy and download.
BBCode Generator
BBCode Generator runs locally in your browser with bounded input, copy and download.
Fancy Text Generator
Fancy Text Generator runs locally in your browser with bounded input, copy and download.
Markdown Table Generator
Markdown Table Generator processes structured input locally with bounded parsing, copy and download.
Test, diff & debug
Compare outputs and diagnose software or devices.
Diff Checker
Diff Checker processes structured input locally with bounded parsing, copy and download.
JSONPath Tester
JSONPath Tester processes structured input locally with bounded parsing, copy and download.
XML Validator and XPath Tester
XML Validator and XPath Tester processes structured input locally with bounded parsing, copy and download.
Regex Tester
Regex Tester runs locally with bounded input and no request to user-entered targets.
SemVer Compare and Range Tester
SemVer Compare and Range Tester runs locally with bounded input and no request to user-entered targets.
CSS, SVG & color
Author and inspect visual web assets.
CSS Minifier
CSS Minifier runs locally with bounded input and no request to user-entered targets.
CSS Specificity Calculator
CSS Specificity Calculator runs locally with bounded input and no request to user-entered targets.
Color contrast checker
Color contrast checker runs locally with validated inputs, inert output and no target requests.
Color picker
Color picker runs locally with validated inputs, inert output and no target requests.
Color vision simulator
Color vision simulator runs locally with validated inputs, inert output and no target requests.
Image Color Picker
Image Color Picker runs locally in your browser with bounded inputs and no file upload.