All tools

Image Compressor

Reduce image file size with an adjustable quality setting and an instant before/after comparison.

Image Converter

Convert images between JPG, PNG and WebP, with quality control for the lossy formats.

Image Cropper

Crop an image by dragging a selection, with optional fixed aspect ratios such as 1:1 and 16:9.

Image Resizer

Resize an image to exact pixel dimensions or a percentage, with the aspect ratio locked by default.

HTML Entity Encoder & Decoder

Escape text for safe use in HTML, or decode entities back into readable characters.

JSON Formatter

Format, validate and minify JSON with clear error messages that point at the exact position.

Regex Tester

Test a regular expression against sample text with live highlighting and capture groups.

Lorem Ipsum Generator

Generate placeholder paragraphs, sentences or words for mockups and layout testing.

Remove Duplicate Lines

Remove repeated lines from a list, with options to sort, trim whitespace and ignore case.

Slug Generator

Turn any title into a clean, lowercase, hyphenated URL slug with accents stripped.

Text Case Converter

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case.

Text Diff Checker

Compare two blocks of text line by line and highlight what was added, removed and unchanged.

Word Counter

Count words, characters, sentences, paragraphs and estimated reading time as you type.

Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin with the formulas shown.

Unix Timestamp Converter

Convert Unix timestamps to human dates and back, in local time and UTC, with ISO 8601 output.

Age Calculator

Calculate exact age in years, months and days, plus total days and the next birthday.

BMI Calculator

Calculate body mass index from height and weight, in metric or imperial units.

Loan & EMI Calculator

Calculate the monthly repayment, total interest and total cost of a loan from amount, rate and term.

Percentage Calculator

Work out a percentage of a number, what percentage one number is of another, and percentage change.

Meta Tag Generator

Generate title, description, canonical, Open Graph and Twitter Card tags with live length checks.

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to text, with UTF-8 and URL-safe support.

JWT Decoder

Decode a JSON Web Token to inspect its header, payload, expiry and claims.

Secure Password Generator

Generate strong random passwords using the browser's cryptographic random number generator.

SHA-256 Hash Generator

Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text using the Web Crypto API.

UUID Generator

Generate random version 4 UUIDs in bulk, with uppercase and no-hyphen options.

Colour Contrast Checker

Check text and background colours against the WCAG 2.1 contrast requirements for AA and AAA.

CSS Gradient Generator

Build linear and radial CSS gradients visually and copy the generated background property.

HEX to RGB Converter

Convert colours between HEX, RGB and HSL with a live preview and copyable CSS values.

URL Encoder & Decoder

Percent-encode text for safe use in URLs, or decode an encoded URL back to readable text.

URL Parser

Break any URL into protocol, host, port, path, query parameters and fragment.

UTM Builder

Build campaign tracking URLs with correctly encoded utm_source, medium, campaign, term and content.