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UnderByte compresses images and PDFs to the exact upload limit you need, like 20 KB, 200 KB, 500 KB, or 1 MB. Everything runs in your browser, so files stay on your device after the app loads. It handles JPG, PNG, WebP, and PDF, supports batch mode, and is built for real-world government, visa, job, and form-upload size limits.
UnderByteCompress images and PDFs to exact size limits
Vince Priorleft a comment
I built UnderByte because I kept running into awful upload forms that reject files for being a few KB too large, especially for PDFs, passport photos, signatures, resumes, and government forms. Most compressors either upload your files, make you guess the quality settings, or don’t aim for an exact target size. So I wanted something simpler: pick a file, set a limit like 200 KB or 1 MB, and get...
UnderByteCompress images and PDFs to exact size limits