One source baseline
Every variant begins from the same decoded pixels for a meaningful comparison.
Free Tool
Compare Image Formats
Upload an image to see the file size for PNG, WebP (85% and 70%), AVIF, and JPG side-by-side. Download any format directly — all processing is local.
Watch the workflow
Upload once — compare PNG, WebP 85%, WebP 70%, AVIF, and JPG file sizes side by side
Drop an image here
or click to browse — JPG, PNG, WebP, AVIF, HEIC
How to read this
Sizes are shown for a scaled-down version of your image (max 2000px) for fast encoding. Download size may differ for very large originals. The α symbol indicates formats that support transparency. AVIF encoding uses WASM — it initialises on first use and may take a moment.
For more detail, read: PNG vs WebP vs AVIF — Which Format for Transparency?
How it works
- Drop a PNG, JPG, WebP, or AVIF source image
- The tool re-encodes it as PNG, WebP, and AVIF and measures each output size
- View the visual quality and file size for each format side by side — pick the best fit for your use case
Frequently asked questions
Which format should I use for photos?
WebP or AVIF give the best balance of quality and file size for photos. AVIF typically produces 20–30% smaller files than WebP at the same quality. PNG is lossless but produces the largest files.
Which format should I use for transparent images?
PNG is the most compatible. WebP supports transparency and is smaller. AVIF supports transparency with the best compression. Avoid JPEG — it does not support transparency.
Does the comparison include the same quality setting for all formats?
Yes. The tool uses a consistent quality target across all three formats so you get an apples-to-apples comparison.
Related tools
Delivery decision
Judge formats from the same source and the same view
Four encodes make the size-versus-quality trade-off visible without asking you to convert and organize separate files manually.
4 branches
PNG · WebP · AVIF · JPG
Measured savings
File sizes are shown beside the actual rendered outputs.
Use-case fit
Transparency, compatibility, and photographic detail matter as much as the smallest number.
Know before you process: Browser encoding support can differ; verify the chosen format against the browsers or platform you need to serve.
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