Free online tools

Fast conversion & coding tools, right in your browser.

Unit converters, encoders, formatters and text utilities — all free, all run locally in your browser. No sign-up, no uploads, no tracking.

Converters

Length, temperature, weight

Coding

Base64, URL, JSON, Hex

Date & Time

Date diff, timezone

Text

Stats & utilities

Network

IP & subnet helpers

Converters

Instant unit conversion
Length Converter

Millimeters to miles and everything between: mm, cm, m, km, inch, foot, yard, mile.

Open →
Temperature Converter

Celsius, Fahrenheit and Kelvin in both directions.

Open →
Weight Converter

Grams, kilograms, tonnes, pounds and ounces.

Open →

Coding tools

Encode, decode, format
Base64 Encode / Decode

Encode or decode text to Base64, and back again.

Open →
URL Encoder / Decoder

Percent-encode or decode a URL or query string.

Open →
JSON Formatter

Beautify, validate and compact JSON in one click.

Open →
Hex ↔ ASCII

Convert text to hex bytes and back.

Open →

Date & time

Calendars and clocks
Date Difference Calculator

Days, weeks, months and years between two dates.

Open →
Timezone Converter

Convert a time between UTC offsets in seconds.

Open →

Text

Write and measure
Text Statistics

Count characters, words, lines and bytes of any text.

Open →