Last reviewed: July 23, 2026
Use JPEG for broadly compatible photographs, PNG for lossless graphics and hard-edged transparency, WebP for modern photographic or transparent web derivatives, and AVIF when smaller modern delivery justifies slower encoding and extra compatibility checks. Always test the real image and destination.
There is no permanent winner among JPEG, PNG, WebP and AVIF. A product photograph, a transparent cutout and a screenshot with tiny text fail in different ways. Start with three questions: does the image need transparency, is exact pixel reproduction important, and what software or platform must open the result? File size comes after those answers, not before them.
| Image and destination | First format to test | Why | What can go wrong |
|---|---|---|---|
| Photograph with no transparency | JPEG | Broad compatibility and predictable photographic output | Repeated saves can create block and edge artifacts |
| Modern website photograph | WebP, compared with JPEG | Often useful for smaller web derivatives | Older desktop or publishing tools may be uneven |
| Transparent product cutout | WebP or PNG | Both preserve alpha | Lossy WebP can alter soft transparent edges; PNG may be large |
| Logo, UI graphic or text screenshot | PNG or lossless WebP | Crisp edges and flat colors matter | A lossy setting can blur text and thin lines |
| Bandwidth-sensitive modern delivery | AVIF, compared with WebP | Can compress web photographs efficiently | Encoding is slower and non-browser workflows need checking |
| File sent to unknown clients or old software | JPEG or PNG | Safer compatibility baseline | The file may be larger than a newer alternative |
JPEG is still a sensible default for ordinary product photography, email attachments and systems with unknown image support. It cannot store transparency, so transparent pixels need a chosen background. Avoid repeatedly opening and resaving a JPEG: every lossy generation can add damage around text, edges and fine texture. Keep the original and make each derivative from that source.
PNG works well for logos, interface graphics, screenshots, diagrams and transparent assets with hard edges. It is not automatically a high-quality choice for every image; a detailed photograph stored as PNG can be unnecessarily large. If the source is a transparent logo or small text graphic, PNG is a reliable baseline against which to compare lossless WebP.
WebP supports both photographic compression and transparency, which makes it useful for storefront and web derivatives. It should still be tested against JPEG or PNG at the same dimensions. BatchMint's published fixture includes a case where JPEG quality 82 was smaller than WebP quality 82, so the extension alone cannot predict the winner. Numeric quality values also do not mean identical visual quality across codecs.
AVIF can be attractive for modern web delivery, especially when download size is important. Its encoder is slower, and compatibility outside current browsers is less consistent than JPEG or PNG. Use it when you control the destination or have a fallback, and inspect gradients, fine detail and decode behavior on representative devices before replacing an established format.
The current workspace accepts JPEG, PNG and static WebP input, then exports JPEG, PNG, WebP or AVIF. It does not currently accept HEIC/HEIF, PSD, RAW, TIFF, video or animated-image input. JPEG output composites transparency onto the selected background; PNG uses OxiPNG optimization; AVIF is loaded on demand. A requested target byte size is not guaranteed for every source.
A web-platform overview of image formats and their characteristics.
Current input, output, transparency and compatibility boundaries.
Exact fixture, encoder and byte measurements with explicit scope limits.
No. Image content, encoder and settings all matter. Compare representative files at the same dimensions and inspect visual quality; BatchMint's published benchmark includes a fixture where JPEG was smaller at the tested settings.
Only if transparency is no longer needed and you intentionally choose a background color. JPEG cannot preserve alpha transparency.
Avoid making AVIF the only deliverable when older clients, desktop software or an upload platform have not been tested. Encoding time and downstream compatibility can outweigh the byte saving.