# Compress PDF to 100 KB > Compress a PDF to 100 KB or less for application forms that cap documents at 100 KB. Processed in an isolated cloud sandbox and deleted automatically. Free, no sign-up, no watermark. URL: https://www.converterrr.com/compress-pdf-to-100kb Shrink a PDF to 100 KB or less for application forms that cap documents at 100 KB. API: `POST /api/v1/jobs` with `"operation": "compress", "target_size": "100kb"` (paid plans). ## How to compress a PDF to 100 KB 1. **Add your PDF.** Drop one or more PDF files onto the compressor above, paste them, or click to browse. 2. **100 KB is preset.** The target is already set to 100 KB, and each file is compressed to land at or just under it. You can switch to another size or a percentage to reduce by. 3. **Compress.** Click Compress. The PDF is processed in an isolated cloud sandbox and deleted afterwards. 4. **Check and download.** Check the new size, then download each file or all of them as a ZIP. ## Good to know - 100 KB works for one or two scanned pages or a text-only document. Scans are downsampled hard, so check the small print is still legible. - That's about 10 KB per page for a 10-page document (text-only pages only). Text stays selectable at any size; it's the scans and photos that get downsampled. - 100 KB here means 100,000 bytes, so the result also fits forms that count 1 KB as 1,024 bytes. - PDF files are compressed in an isolated cloud sandbox created just for your job; the upload and the result are deleted automatically afterwards. ## What fits in 100 KB Spread across the pages, 100 KB gives each page this much room. Text costs very little; scans and photos cost the most. | Pages | Budget per page | What survives | | --- | --- | --- | | 1 page | 100 KB | Scans readable, photos softened | | 5 pages | 20 KB | Text-only pages only | | 10 pages | 10 KB | Text-only pages only | | 25 pages | 4 KB | Too tight: split the PDF | | 100 pages | 1 KB | Too tight: split the PDF | _Rough guide. Text-only pages are often just a few KB each; a scanned page is mostly image data._ ## What 100 KB is typically for - Certificates and ID scans on government and exam forms - Single-page letters and receipts - Forms that only accept very small attachments Limits vary by site and change over time; check the exact number where you're uploading. ## How PDF gets smaller Downsamples and recompresses images, subsets and compresses fonts, and removes duplicate data. [Compress PDF by quality level instead](https://www.converterrr.com/compress-pdf) ## Neighbouring sizes - [Compress PDF to 200 KB](https://www.converterrr.com/compress-pdf-to-200kb): Scanned certificates - [Compress PDF to 300 KB](https://www.converterrr.com/compress-pdf-to-300kb): Short scanned documents ## PDF to 100 KB: frequently asked questions ### How do I compress a PDF to 100 KB? Drop the PDF onto the compressor above. The 100 KB target is already set, so just click Compress and download the result. ### Will the file be exactly 100 KB? It aims to land at or just under 100 KB. 100 KB here means 100,000 bytes, so it also fits sites that count 1 KB as 1,024 bytes. ### How much quality will I lose at 100 KB? 100 KB works for one or two scanned pages or a text-only document. Scans are downsampled hard, so check the small print is still legible. That's about 10 KB per page for a 10-page document (text-only pages only). Text stays selectable at any size; it's the scans and photos that get downsampled. ### My PDF is already smaller than 100 KB. What now? Then it already fits, and compressing it further would only cost quality. Upload it as it is, or pick a smaller target if you need it smaller still. ### What if my PDF can't get down to 100 KB? Long scanned PDFs may not reach 100 KB while staying readable. Split the PDF into parts, or pick a larger size. ### What is 100 KB typically needed for? Common reasons: certificates and ID scans on government and exam forms; single-page letters and receipts; forms that only accept very small attachments. Limits vary by site, so check the exact number where you're uploading. ### Is my PDF private? Yes. It's processed in an isolated cloud sandbox for your job only and deleted automatically afterwards.