Free online converters

8 free converter tools that run in your browser. No account, no uploads, no watermarks.

Conversions you would otherwise search for one at a time. Each one is instant and works offline once the page has loaded.

All 8 converter tools

Aspect Ratio Calculator Calculate width, height, or ratio from any two values. Supports 16:9, 4:3, 21:9, and custom ratios. File Size Converter Convert file sizes between bytes, KB, MB, GB, and TB instantly. Binary (1024) and decimal (1000) modes. Morse Code Translator Translate text to Morse code or decode Morse back to text. Includes reference chart and audio playback with adjustable speed. Number Base Converter Convert numbers between binary, octal, decimal, and hexadecimal in real time. Roman Numeral Converter Convert between Roman numerals and Arabic numbers instantly. Supports values from 1 to 3,999. Text to Binary Convert text to binary, hexadecimal, or octal — and decode any of those formats back to plain text. Instant and browser-based. Unit Converter Convert between units of length, weight, temperature, area, and speed. Metric and imperial support. Unix Timestamp Converter Convert Unix epoch timestamps to human-readable dates and back. Supports any timezone.

How to use these tools

Pick the tool you need from the list above — each one opens on its own page.
Add your file or type your input. Nothing is uploaded; the work happens on your device.
Adjust the options until the preview looks right.
Download or copy the result. There is no watermark and no sign-up.

Frequently asked questions

Are the conversion rates live?

Unit, data-size and number-base conversions are exact and fixed. Anything that depends on a live rate says so on the tool itself.

Do converters work offline?

The ones based on fixed factors do, once the page is cached. Anything needing a live lookup needs a connection.

Is my input recorded?

No. Conversions happen in the page and nothing is sent anywhere.

Can I convert file formats here?

Yes — image, audio, video and document format conversion all have their own tools, and all run on your device.

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