Drop images to convert.

PNG · JPG · WebP · AVIF · GIF · BMP · many at once · never uploaded

Relay converts, resizes, and compresses a whole batch of images at once — pick an output format and quality, resize by longest side, exact dimensions, or a ready-made social preset, and download everything as a single zip. Each image is re-encoded in your browser (which also strips its metadata), so your photos never leave your device.

Conversion happens with the browser's canvas, so it reads any image format your browser can display and writes PNG, JPG, WebP, or AVIF (whichever your browser can encode — unavailable formats are hidden). Re-encoding removes embedded metadata such as EXIF location. HEIC photos usually can't be read directly — run them through the HEIC→JPG tool first. Images are never scaled up beyond their original size.

Questions & answers

Which formats does it convert between?

It converts between PNG, JPG, WebP, and AVIF, and can resize or compress at the same time.

Can I convert a batch of images together?

Yes — drop many images at once, convert them in a single pass, and download them all as a zip.

Is anything uploaded?

No. Every image is converted locally in your browser and never leaves your device.