Sharing readability test
Compare measured resizing and compression simulations.
Apply a real local resize and JPEG compression scenario. Mark small text or thin lines for enlarged before/after crops. Edge loss and pixel difference are image measurements, not a readability guarantee or a prediction of any social platform.
Static PNG, JPEG, WebP • up to 20 MiB / 20 megapixels • 90-second operation limit • 40 million selected pixels total • runs locally • exported raster files omit original metadata. Colours are the browser-rendered sRGB pixels, not a print colour proof.
How it works
- Review your inputs and the supported scope.
- Set constraints, run the operation and inspect the evidence.
- Reopen downloaded output before using it.
Example & practical use
Enter your own files or measurements; review the computed result and its stated limits.
Limits and help
Simulations are not guarantees of any platform's actual compression or legibility.
Your files are yours.
Image and text processing happens in your browser. Your files are not uploaded to our servers.
Troubleshooting
Check the original file format and selection limit. Renaming an extension does not convert a file. For a very large image, close other heavy tabs and try a smaller copy.