438+ conversion tools

Free Online File & Unit Converter

Convert files and units directly in your browser with OmniConvert. Support for 94 file formats and 345 unit conversions. No uploads, no tracking, 100% private.

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Client-side Only

Instant Results

NIST Precision

Your All-in-One Conversion Toolkit

OmniConvert is a free, open-source conversion toolkit that runs entirely in your browser — your files never leave your device.

• File conversion between JPG, PNG, WebP, GIF, and more via Canvas API

• Unit conversion across 13 categories with NIST SP 811 precision

• No accounts, no watermarks, no file size limits

• Works offline as a Progressive Web App

File Converters

.jpg → .png

JPEG Image to Portable Network Graphics

.jpg → .webp

JPEG Image to WebP Image

.jpg → .pdf

JPEG Image to Portable Document Format

.png → .jpg

Portable Network Graphics to JPEG Image

.png → .webp

Portable Network Graphics to WebP Image

.png → .pdf

Portable Network Graphics to Portable Document Format

.webp → .jpg

WebP Image to JPEG Image

.webp → .png

WebP Image to Portable Network Graphics

View all file converters →

Unit Converters

Meter → Foot

Foot → Meter

Centimeter → Inch

Inch → Centimeter

Kilometer → Mile

Mile → Kilometer

Millimeter → Inch

Inch → Millimeter

All Unit Categories

Frequently Asked Questions

What is OmniConvert?

OmniConvert is a free online toolkit for file format conversions (JPG, PNG, WebP, GIF, etc.) and unit conversions (length, mass, temperature, and more). It runs entirely in your browser with no server uploads required.

Is my file data safe?

Yes. All file processing happens locally in your browser using client-side JavaScript and WebAssembly. Your files are never uploaded to any server. Once you close the tab, all data is gone.

What conversions are supported?

OmniConvert supports image file conversions between formats like JPG, PNG, WebP, GIF, BMP, TIFF, and AVIF. For units, it covers 10 categories including length, mass, temperature, volume, area, time, speed, energy, pressure, and power.

Do I need to pay?

No. OmniConvert is completely free with no premium tiers, no ads, and no usage limits. It is open-source software.

Can I use it offline?

Yes. OmniConvert is a Progressive Web App (PWA). Install it from your browser and use it anywhere — no internet connection needed.

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