Why strictly under 100KB?
Many legacy systems (especially government portals like USCIS, IRCC, and Indian Railway Recruitment) rely on older server architectures that strictly reject files over 100KB (approx 0.1MB). Even a 105KB file will fail. Our "Rasterize" engine is specifically tuned to aggressively strip metadata and downsample images to meet this hard limit without turning your document into a blur.
Aggressive Downsampling
Smartly reduces image DPI from 300 to 72 or 96 DPI to slash file size by up to 90%.
Zero-Knowledge Privacy
Processing happens in your browser's memory. No copies are ever sent to a remote server.
Font Subsetting
We remove unused font characters from the file to save precious kilobytes.
Which Compression Mode fits your 100KB goal?
| Mode | Best For | Compression Power | Quality Impact |
|---|---|---|---|
| Compact | Text Documents (Resumes, Contracts) | Moderate (30-60%) | Very Low (Text stays sharp) |
| Rasterize | Scanned IDs, Passports, Photos | Extreme (70-95%) | Medium (Images may soften) |
| Original | Print / Archival | None (0%) | None (Lossless) |
* To hit the 100KB limit, we strongly recommend starting with Rasterize Mode if your file contains images.
Troubleshooting: "My PDF is still over 100KB!"
Is it a "Scanned" PDF?
Scanned pages are essentially giant photos. A 5-page scan can easily be 10MB. To fix this, use our Rasterize mode and lower the DPI slider to 72 DPI.
Are there hidden layers?
Sometimes PDFs created in Illustrator or CAD have heavy invisible layers. Try using our PDF to JPG tool first, then convert that JPG back to PDF. This "flattens" the file effectively.
How to reduce PDF size below 100KB
Upload your file
Drag your file into the box above. We accept large files (up to 1GB) because processing is local.
Select 'Rasterize' Mode
Select the Rasterize option. This is the secret weapon for hitting the 100KB target.
Adjust DPI & Download
If the preview shows >100KB, slide the DPI setting to '72' or '96'. Click Download when ready.
FAQ: Compressing to 100KB
Is it possible to compress a 10MB file to 100KB?▼
It depends on the content. Text-heavy PDFs compress very well. However, reducing a 10MB image-heavy PDF to 100KB (a 99% reduction) may result in blurry images. We recommend using our Rasterize mode and lowering the DPI to 72 or 96 for the best chance.
Other Compression Targets
If 100KB is too small and makes your file blurry, try a slightly larger target: