JPG vs PNG vs WebP vs AVIF: Practical Format Decision Guide
Understand when to choose JPG, PNG, WebP, or AVIF based on image content, compression goals, and delivery context.
In short
Choose format by content type and destination, not by trend alone.
For this converter, think in two steps: input accepts any image format, then you choose one clear output target—PNG, JPG, or WebP—based on destination and quality/size needs.
Pick format by content physics, not hype
JPEG and AVIF excel when smooth gradients and photographic noise dominate. PNG excels when alpha transparency or razor-sharp UI edges matter. WebP sits between them as a general web delivery format with broad modern support.
AVIF can beat WebP on bytes but encoding time and decode cost vary by device. Measure on mid-range Android hardware if mobile traffic is majority, not only on a developer laptop.
Build a small decision matrix for your stack
Write a one-page matrix: asset type → master format → delivery formats → max dimensions → quality defaults. Share it with design and engineering so exports do not drift per campaign.
Revisit the matrix yearly. Browser support and CDN features change; what required PNG fallbacks in 2022 may be safe to simplify later.
Sample byte sizes from one 3000×2000 photo
Rough browser-export ballpark (your encoder may differ): JPEG q85 ~850 KB, WebP q82 ~320 KB, AVIF q75 ~220 KB, PNG ~8–12 MB.
Use the matrix for policy; use A/B byte tests on your actual catalog for decisions—not blog averages alone.
Why this works
- Each format optimizes a different trade-off: compatibility, transparency, or compression efficiency.
- Selecting by destination avoids avoidable quality or performance losses.
- Validating browser/runtime support prevents delivery regressions.
When to use this workflow
- You are defining media standards for a project.
- You need predictable output quality across many pages.
- You want smaller files without random artifacts.
Step-by-step guide
- Group assets by type: photo, UI graphic, icon, illustration.
- Assign a default format per group.
- Run sample exports and compare quality and size.
- Adopt naming and export presets to keep consistency.
- Review quarterly as browser and codec support evolves.
Common mistakes to avoid
- Applying one format policy to all asset categories.
- Ignoring transparency and editing needs.
- Comparing outputs with inconsistent quality settings.
Frequently asked questions
What are the converter output formats?
Output formats are exactly three: PNG, JPG, and WebP.
Is AVIF always the smallest format?
Often very efficient, but results vary by image content and encoder support in the active browser.
Can I keep animation when converting GIF?
The converter does not output animated GIFs. It opens a frame picker so you can export still PNG, JPG, or WebP images. To build a new animated GIF from images, use the GIF maker tool.
Does the converter support TIFF, PSD, or RAW files?
Yes for conversion to PNG, JPG, or WebP. TIFF, PSD, and many RAW camera formats are supported as input, though rare camera-specific RAW variants can still vary.