What realistically fits in 100 KB
| Your PDF | Usual outcome at 100 KB |
|---|---|
| Typed document exported from Word or Google Docs, 1–5 pages | Usually fits in Stage A or B with text kept |
| One scanned page (certificate, ID, mark sheet) | Often fits in Stage B; very detailed colour scans may need Stage C |
| Phone-camera photo of a page saved as PDF | Usually needs Stage B at lower quality, sometimes Stage C |
| 3 or more scanned pages in colour | Rarely fits without Stage C; consider splitting or grayscale scanning |
At 100 KB every page has roughly 100 KB divided by the page count to work with. A single scanned page has plenty of room; a ten-page scan has about 10 KB per page, which is too little for clear colour images.
How DocNimble gets a PDF under 100 KB
The compressor works on your device and stops at the first step that reaches 100 KB:
- Already small enough? If the PDF is already at or under 100 KB, you get the original back untouched. Nothing is recompressed for no reason.
- Stage A — lossless clean-up. Unused objects and inefficient structures are removed. Text, images and layout stay exactly the same.
- Stage B — image recompression. Photos and scans inside the PDF are re-encoded at the highest JPEG quality that fits. The text layer is kept, so words stay selectable and searchable.
- Stage C — page images (only if you allow it). When A and B are not enough, ticking the rasterise option turns each page into an image at a progressively smaller size. This reaches small targets, but the text is no longer selectable, so check readability before you submit.
The tool reports the real size of the downloaded file. It only says “target achieved” when the measured bytes are at or under the limit; otherwise it gives you the smallest result it reached and says so.
Prepare the file so 100 KB is achievable
- Remove what the form did not ask for. Blank backs of pages and instruction sheets cost bytes. Delete them with Remove PDF pages before compressing.
- Scan at 150–200 DPI, not 600. Higher resolution makes a bigger file that the compressor then has to shrink harder. For text documents 150–200 DPI is easily readable.
- Use grayscale for black-and-white documents. Colour roughly triples the image data for no benefit on a printed certificate.
- Crop scanner borders. Dark edges and table texture are expensive to encode. Crop PDF trims them.
- If you only have photos, shrink them first with Compress Image, then build the PDF with JPG to PDF.
If it still will not go under 100 KB
Check whether the form accepts separate uploads for each document; splitting a multi-page PDF with Split PDF gives each part the full 100 KB. If it must be one file, re-scan in grayscale at 150 DPI and try again before using Stage C. Our upload rejection checklist covers other reasons a portal may refuse a file even when the size looks right.
Check before you upload
- Open the downloaded PDF and zoom to 100% on every page: names, roll numbers, stamps and signatures must be readable.
- Confirm the file size in your file manager shows 100 KB or less (some portals count 1 KB as 1,000 bytes; the tool’s limit uses 1,024, so leave a small margin if the form is strict).
- Keep the original. A compressed copy is for uploading, not for your records.
Questions about this workflow
Can every PDF be compressed to 100 KB?
No. A short typed document almost always fits, and a single scanned page usually does, but long colour scans may only reach 100 KB with the page-image option, and occasionally not at all. The tool tells you the real size it reached.
Will my PDF still have searchable text?
Yes, if the target is reached in Stage A or B. Only the optional Stage C turns pages into images, and it is off unless you tick it.
Is my file uploaded to a server?
No. Compression runs in your browser; the PDF is not sent to DocNimble.
Why does the portal still say my file is too big?
Some portals measure 1 KB as 1,000 bytes instead of 1,024. Set a slightly lower target, such as 95 KB, to leave a margin.