Is this converter free?

Yes, WebConverter is completely free to use. There are no hidden fees, no subscription plans, and no limits on the number of files you can convert.

Do my files get uploaded to a server?

No. All conversions happen entirely in your browser using WebAssembly. Your files never leave your device, ensuring complete privacy and security.

What formats are supported?

This converter supports the following formats: BMP, DDS, GIF, HDR, ICO, JPEG, KTX, PGM, PIC, PNG, PPM, PSD, TGA, WebP.

Can I use this offline?

Yes! WebConverter works as a Progressive Web App. Once installed, you can convert files without an internet connection.

Are there file size limits?

No, there are no artificial file size limits. The only limit is your device's available memory and processing power.

Convert to HDR

Convert images to Radiance HDR format — free, private, runs entirely in your browser.

Convert any image to Radiance HDR instantly — free, private, and in your browser. Essential for environment maps and lighting workflows. No upload, no sign-up, no file size limits.

Convert to

BMPDDSGIFHDRICOJPEGKTXPGMPICPNGPPMPSDTGAWebP

Drop files here or click to browse

Supported formats: BMP, DDS, GIF, HDR, ICO, JPEG, KTX, PGM, PIC, PNG, PPM, PSD, TGA, WebP

Folder

Output: Same folder

You saved about 0 kg CO₂ compared to using other online converters.
No data transfer — all data stays on your device!

About the HDR Format

HDR (High Dynamic Range), also known as Radiance RGBE, is an image format designed to store lighting information that exceeds the standard 8-bit-per-channel range. Developed by Greg Ward for the Radiance rendering system, HDR files use a compact encoding that represents each pixel with three 8-bit mantissas and a shared 8-bit exponent. This enables storage of a much wider range of luminance values — from deep shadows to bright highlights. HDR images are essential in computer graphics for environment mapping, image-based lighting, and photographic tone mapping workflows.

Features

Near-Zero CO₂

Server-based converters upload your file, process it remotely, and send it back — consuming network and data-centre energy on every request. WebConverter runs entirely on your device, so the only energy used is your local CPU. No data transfer, no server electricity.

Install for Offline Use

WebConverter works offline as a Progressive Web App. Click "Add to Home Screen" on mobile or the install button in your browser's address bar. Once installed, you can convert files without any internet connection.