Image Format Comparison Lab
Stop guessing which format is smallest — encode your own image six ways and see the real numbers.
Drop one image to compare formats
Any supported image (max 20MB) — encoded six ways, privately in your browser
JPG, WebP, AVIF and JXL use this quality. PNG and JP2 are always lossless, so they ignore it — that difference is part of the comparison.
Processing...
Six Formats, One Image, Real Numbers
Every "which format is best?" article uses somebody else's photo. This free format comparison lab uses yours: drop one image and it is encoded as JPG, PNG, WebP, AVIF, JPEG XL and JPEG 2000 at one quality setting, side by side, with exact sizes and a download for each. All in your browser — the image never leaves your device.
Apples to Apples
Same pixels, same quality setting for every lossy format. PNG and JP2 run lossless — clearly labelled, because that difference is the point.
The Winner, Crowned
The smallest result is marked automatically, with each size also shown as a percentage of your original file.
Why Results Differ by Photo
Smooth photos love AVIF and JXL; screenshots with sharp text love lossless PNG and JXL; noisy high-ISO shots compress less everywhere. That is exactly why the honest test is your own image, not a benchmark chart.
Related JPEG XL Tools
Check Out Other Popular Tools
H1 Tag Checker
Check your H1 tag for SEO compliance. Analyze count, length, and keyword optimization instantly.
Webcam Test
Test your webcam online to check if it is working properly and find out useful information about it.
Canonical Checker
Check if your webpage has a valid rel="canonical" tag to prevent duplicate content issues in search engines.
Was this tool helpful?
Comments
Loading comments...