Try it, measure it, then decide
These experiments demonstrate file-format tradeoffs using files that you can inspect and download. They are not universal benchmarks: results depend on your own browser, encoder, image, and settings. All interactive image processing takes place inside your browser; no file is uploaded by these labs.
Use the downloadable test files to reproduce examples and explore edge cases. Read the linked guides for the reasons behind each result.
Image format comparison lab
Export the same pixels to JPEG, PNG, WebP and AVIF, measure the actual bytes and compare previews.
Open image lab ↗Privacy experimentPhoto metadata lab
Inspect whether a JPEG contains an EXIF block and test local re-encoding to remove it.
Open privacy lab ↗Reproducible examplesFree sample file library
Original images, example PDFs, subtitled clips text, CSV and JSON, including intentionally invalid examples.
Get sample files ↗Practical workflowsStep-by-step learning center
Understand when conversions fail, check the resulting output, and work safely with personal files.
Read workflows ↗How to interpret the results
File size alone does not measure image quality. A smaller file can hide blurry text or remove alpha transparency. WebP and AVIF support also depends on the browser's encoding features. Compare what you can see, measure the output in bytes, and open it in the application where you plan to use it.
Metadata detection is another narrower test: finding or removing an EXIF block is not the same as proving that every possible identifying trace is gone. Our experiments explain that distinction rather than promising absolute anonymity.
Want the deeper technical explanation?
Explore our five technical handbooks covering image compression, PDF internals, photo privacy, video codecs and audio engineering. They pair concepts with practical checks, worked arithmetic and source specifications.