Can I convert HEIC photos from my iPhone?

Only if your browser can decode HEIC, which most desktop browsers cannot. Exporting as JPEG from your phone or Photos app first is the reliable route.

Does converting to PNG improve quality?

No. PNG stores exactly what it is given, so converting a JPEG produces a lossless copy of compression artefacts, at a larger size.

Why is AVIF greyed out?

Your browser can display AVIF but cannot encode it from a canvas. The option is tested when the page loads and disabled rather than failing mid-batch.

Convert image formats in bulk

Move a whole folder between JPEG, PNG, WebP and AVIF, with control over transparency and quality.

Drop images here

JPG · PNG · WebP · AVIF · GIF · BMP

Processed on your device
Built for large batches
No account, no upload

What each format is good at

JPEG is the safe universal choice for photographs and has no transparency. PNG is lossless and keeps an alpha channel, which makes it right for logos, screenshots and anything with hard edges — and wasteful for photographs. WebP does both jobs competently and is broadly supported. AVIF generally produces the smallest photographic files, but browser support for encoding it is narrower than for viewing it.

There is no universally correct answer, only a fit for the job. Converting a folder of product photographs to WebP is usually a clear win; converting a folder of transparent logos to JPEG will flatten every one of them onto a background colour.

Transparency and flattening

When the output format has no alpha channel, transparent pixels need something behind them. The Format panel exposes that background colour whenever the choice applies, defaulting to white. If you are converting product cut-outs for a marketplace that expects a white field, this is the setting you want.

Converting in the other direction — JPEG to PNG — does not restore transparency or recover detail. It produces a lossless copy of an already-lossy image, usually at a considerably larger size.

What conversion does to metadata

Every converted file is redrawn and re-encoded, so EXIF, GPS coordinates and camera details do not carry across. For publishing to the web this is usually welcome. If you rely on that metadata for cataloguing, keep your originals — the converted copies will not have it.

Questions

Can I convert HEIC photos from my iPhone?: Only if your browser can decode HEIC, which most desktop browsers cannot. Exporting as JPEG from your phone or Photos app first is the reliable route.
Does converting to PNG improve quality?: No. PNG stores exactly what it is given, so converting a JPEG produces a lossless copy of compression artefacts, at a larger size.
Why is AVIF greyed out?: Your browser can display AVIF but cannot encode it from a canvas. The option is tested when the page loads and disabled rather than failing mid-batch.