UtilityBaseImage Tools
Image Converter
Convert images between WebP, JPEG, and PNG in batches — with size comparison.
Updated July 8, 2026
How to use the image converter
- 1Drop in one or many images.
- 2Choose the target format and quality (quality applies to WebP and JPEG).
- 3Convert and check the size change per file.
- 4Download individually or grab everything with Download all.
Common uses
- Converting listing photos to WebP for a faster storefront
- Turning WebP downloads into JPEG for tools that don't accept it
- Batch-converting a folder of PNGs to slim JPEGs for sharing
- Making transparent PNG assets into WebP without losing the alpha channel
Frequently asked questions
Which format should I convert to?
WebP for anything going on the web — smallest files at equal quality, with transparency support. JPEG when maximum compatibility matters (old software, some marketplaces, email clients). PNG only when you need lossless quality or transparency in a universally-supported format — it's the largest of the three for photos.
What happens to transparency?
PNG and WebP preserve it. JPEG has no transparency, so transparent regions become white in JPEG output — convert logos and cutouts to WebP or keep them PNG.
Why did my file get bigger after converting?
Converting an already-compressed JPEG to PNG always inflates it (lossless encoding of lossy data), and re-encoding at a higher quality setting than the source can too. The per-file size readout shows the direction in green or amber — if it grew, that conversion wasn't the right move.
Why won't my iPhone photos convert?
iPhones default to HEIC, which browsers can't decode. Fix at the source: Settings → Camera → Formats → Most Compatible makes the phone shoot JPEG, or share/export the photo (which converts it) before dropping it here.
About this tool
The image converter changes formats in batches: drop in any number of images, pick WebP, JPEG, or PNG, set the quality, and download each result — or all of them — with a before/after size readout per file so you can see exactly what the conversion bought you. WebP typically lands 25–35% smaller than JPEG at matching visual quality, which is why every image-heavy site wants it; JPEG remains the works-absolutely-everywhere choice; PNG is the lossless option for graphics and screenshots. Conversion happens on a canvas in your browser — product photos and personal images are never uploaded.
Like most tools on UtilityBase, the image converter runs entirely in your browser — nothing you enter is uploaded or stored on a server. It's free to use with no account required. Browse more image tools here.
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