Your Swiss Army Knife for Digital Tasks

250+ free online tools for conversions, calculations, PDF, audio, and more. No signup required. Fast, private, and always free.

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New & updated Base64 Encode/Decode Tool Calorie Deficit Calculator Tool Common JSON Errors and How to Fix Them Guide Cron Expression Generator & Explainer Tool Download Time Calculator Tool Grams ↔ Ounces Tool GUID Generator Tool Hours Calculator Tool

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Most used utilities by our community

Kilometers ↔ Miles

Convert between kilometers and miles instantly. Perfect for international travel, running distances, and map calculations.

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Meters ↔ Feet

Convert between meters and feet. Essential for construction, height measurements, and international projects.

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Centimeters ↔ Inches

Convert between centimeters and inches. Perfect for screen sizes, clothing measurements, and crafts.

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Kilograms ↔ Pounds

Convert between kilograms and pounds. Essential for weight tracking, shipping, and cooking.

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Grams ↔ Ounces

Convert between grams and ounces. Perfect for cooking, jewelry, and postal measurements.

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Celsius ↔ Fahrenheit

Convert between Celsius and Fahrenheit. Essential for weather, cooking, and science.

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Base64 Encode/Decode

Encode text to Base64 or decode a Base64 string instantly. Handles UTF-8 text including accents and emoji.

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Text Encoding Detector & Converter

Detect the character encoding of text or a file, fix garbled mojibake text, and convert between UTF-8, UTF-16 and Windows-1252.

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URL Encode/Decode

Encode or decode URLs and query strings. Essential for web development and API work.

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JSON Formatter/Validator

Format, minify and validate JSON. Pretty-print minified JSON or find the syntax error that breaks it.

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UUID Generator

Generate random UUIDs (v4), time-ordered v7, time-based v1 and name-based v5 — one at a time or up to 1,000 in bulk.

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UPPERCASE

Convert text to UPPERCASE. All letters become capital letters.

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All Categories

Browse tools by category

Distance & Length

Convert between different units of distance and length
Weight & Mass

Convert between different units of weight and mass
Temperature

Convert between Celsius, Fahrenheit, and Kelvin
Volume

Convert between liters, gallons, cups, and more
Area

Convert between square meters, acres, hectares, and more
Speed

Convert between KPH, MPH, knots, Mach and metres per second
Time & Date

Timezone conversions, date calculators, and more
String Case

Convert text to different cases
Text Transformations

Reverse, sort, clean and style text
Text Analysis

Count characters, words, and estimate reading time
List Utilities

Convert, sort, dedupe and manipulate lists
Encoding & Decoding

Base64, URL, HTML, hex, binary and Unicode encoders, plus an encoding detector
Hash Generators

Generate MD5, SHA, and other hashes
Number Utilities

Number conversions and calculators
Data Size

Storage calculators and converters for bytes, KB, MB, GB and TB
Color Utilities

Color conversion and tools
Image Converter

Convert images between JPG, PNG, WebP, and SVG formats
Image Compressor

Compress images - reduce file size without visible quality loss
Image Effects

Apply blur, sharpen, grayscale and adjust quality
Audio Converter

Convert audio between MP3, WAV, OGG, and other formats
PDF Tools

Convert, merge, split, compress, and secure PDF files
SEO Tools

Tools for search engine optimization and web metadata
Developer Tools

JSON, regex, UUID generators, and more
Finance & Currency

Calculators for finance and currency
Health & Fitness

BMI, calorie, and fitness calculators
Miscellaneous

QR codes, passwords, and other tools
Lightning Fast

All calculations happen instantly in your browser. No waiting for server responses.

Privacy First

Your data stays in your browser. We don't store or track your conversions.

Works Everywhere

Fully responsive design. Use on desktop, tablet, or mobile - even offline!