Compress a PDF to 100 KB or less for upload forms with a hard cap, such as job portals, exam and university applications, and government services. The target is preset to 100 KB. Every page is turned into a JPEG image, three quality levels are tried, and the highest that should fit is used for one final encode, so the size you are shown is the real file’s. 100 KB is tight: across ten pages it is 10 KB a page. Text also stops being selectable. If 100 KB cannot be reached, you get the smallest version and a clear warning. Nothing is uploaded.
How it works
- Drop the PDF. The target field already reads 100 KB; change it if your form states a different limit.
- Press Compress & download. Pages are rendered at 108 dpi and re-encoded at the best quality that fits; a document over 10 pages is estimated from a 3-page sample, then encoded in full.
- Read the result line. It says the file came in under 100 KB, or that 100 KB was not reachable and what size you got instead.
Questions
- Will compressing to 100 KB make the text blurry?
- It can. To get that small, pages may be saved as JPEG images at as low as 35% quality, and small print, stamps and signatures soften first. The text also stops being selectable, since each page is now a picture. If the result is hard to read, raise the target, remove pages the form does not need, or upload the pages as separate files if the form allows it.
- What if my PDF still won’t go under 100 KB?
- Then even the lowest quality tried, 35%, came out too big, and the tool says so instead of pretending: you get that smallest version with a warning. The resolution is not reduced further, so the fix is fewer pages per file. Drop pages you do not need with the PDF page organizer, or split the file and upload each part separately.
- Should I compress a PDF that is already under 100 KB?
- No. If the file already fits, upload it as it is. Compressing would turn its pages into images and lose the selectable text, and a typed document can even come out larger. Check the size in your file manager first; this page is for files that are over the limit.
- Does my file get uploaded?
- No. The models and all processing run inside your browser on your own device. You can verify this yourself: open your browser’s DevTools, watch the Network tab, and process a file: there are no uploads. After the first visit most tools also work fully offline.
- Is merge/split lossless?
- Yes. Merging, splitting, reordering and rotating copy pages intact: text stays selectable, links keep working, quality is untouched. Only the compress pages re-encode content, and they say so.
- How strong is the password protection?
- Without the password the file cannot be opened. The cipher follows the PDF’s own version: AES-128 for PDF 1.6 and 1.7, and the older RC4 cipher for other versions. Choose a real password: the encryption is only as strong as it.
- Can it compress any PDF to 100 KB?
- No, and it will not pretend to. Image-heavy pages compress well; a born-digital text PDF may already be near its floor. The tool reports the size it achieved rather than silently overshooting.