Free Online Tools
20 practical tools for developers, marketers and small businesses. Free to use, no account required, and they run in your browser.
No signup
Open a tool and use it. There are no accounts, trials or usage limits.
Private by design
Inputs and files are processed in your browser and are not uploaded.
No paid services
Nothing depends on an API key, a subscription or a remote processing service.
20 tools
- Developer Tools
JSON Formatter & Validator
Pretty-print, minify and validate JSON with line-and-column error messages. Runs entirely in your browser.
Use tool - Text Tools
Word & Character Counter
Live word, character, sentence and paragraph counts with an estimated reading time.
Use tool - Text Tools
Case Converter
Switch text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case and kebab-case.
Use tool - Calculators & Business
Percentage Calculator
Find a percentage of a number, what percent one number is of another, and percentage increase, decrease or difference.
Use tool - Calculators & Business
Age Calculator
Work out exact age in years, months and days, total days lived and the countdown to the next birthday.
Use tool - Developer Tools
Base64 Encoder & Decoder
Encode and decode Base64 text with full Unicode support, URL-safe output and file-to-Base64 conversion.
Use tool - Developer Tools
URL Encoder & Decoder
Percent-encode and decode URL components or whole URLs, with a clear explanation of when to use which.
Use tool - Developer Tools
UUID Generator
Generate cryptographically random version 4 UUIDs in bulk, then copy or download them.
Use tool - Developer Tools
Unix Timestamp Converter
Convert Unix timestamps in seconds or milliseconds to UTC and local dates, and dates back to timestamps.
Use tool - Image & Design
Color Code Converter
Convert colours between HEX, RGB and HSL (with alpha) and preview the result.
Use tool - Text Tools
Text Diff Checker
Compare two texts side by side and see inserted and deleted lines and characters highlighted.
Use tool - Developer Tools
Regex Tester
Test JavaScript regular expressions with highlighted matches, capture groups and a timeout that stops runaway patterns.
Use tool - SEO & Marketing
Meta Tag Generator
Build title, description, canonical, robots, Open Graph and Twitter Card tags with a live search and social preview.
Use tool - SEO & Marketing
Schema Markup Generator
Create JSON-LD structured data for Organization, LocalBusiness, Product, Article and FAQ pages from your own details.
Use tool - SEO & Marketing
UTM Link Builder
Add campaign source, medium, name, term and content to any URL while keeping its existing parameters.
Use tool - Image & Design
Image Compressor
Shrink JPEG, PNG and WebP images in your browser, compare sizes and download the result. Files are never uploaded.
Use tool - Image & Design
Image Resizer
Resize images to exact dimensions with an optional locked aspect ratio, then export as PNG, JPEG or WebP.
Use tool - Image & Design
QR Code Generator
Create QR codes for URLs, text, email, phone numbers and Wi-Fi, and download them as PNG or SVG.
Use tool - Calculators & Business
Unit Converter
Convert length, mass, temperature, area, volume, speed, time and digital storage units.
Use tool - Calculators & Business
Invoice Generator
Create a printable invoice with line items, discounts and tax, then save it as a PDF from your browser's print dialog.
Use tool
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