Compress PDF to 300KB
Compress PDF to 300KB, 200KB or 100KB when an online form rejects your file. Pick the size you need and this tool finds the best quality that fits under it.
- Exact target: 50KB to 2MB
- Best quality that fits
- Files stay on your device
Loading the PDF compressor…
How to compress PDF to 300KB
- 1
Choose the PDF
Drop the file you need to upload.
- 2
Pick the target size
Choose 300KB, or 100KB, 200KB, 500KB, 1MB or a custom size. Turn on grayscale for very small targets.
- 3
Download under the limit
The tool tries quality levels from high to low and keeps the best one under your size.
Why use this free PDF compressor
Built for speed and privacy. It works on any modern browser, on desktop or phone.
Files never leave your device
It runs inside your browser. Nothing is uploaded to LeadCanal or stored anywhere.
Only the right files open
It accepts .pdf and checks each file's first bytes, so renamed programs or scripts are refused.
Free with no limits we impose
No signup, no watermark and no daily cap. Big files depend only on your device memory.
Several files at once
Where it makes sense, drop many files and download them together as a ZIP.
Compress PDF to 300KB, 200KB or 100KB: which size to pick
| Upload for | Usual limit | Tip |
|---|---|---|
| Government and exam forms | 100KB to 300KB | Scan in grayscale at 150 dpi before you compress |
| Job portals and applications | 300KB to 2MB | Keep CVs as text PDFs where you can |
| Visa and ID documents | 100KB to 500KB | Crop to the document edges first |
| Email attachments | Up to about 20MB | Use 1MB or 2MB for crisp results |
How the compression works
Each page is redrawn as an image at a lower resolution and saved with JPEG compression. The tool starts at 150 dpi and steps down until the file fits.
Text stays readable down to about 72 dpi on a normal A4 page. Below that, use grayscale or split the PDF and upload fewer pages.
- Up to 6 attempts to hit the size
- Shows the size it reached
- Original is never changed
Step-by-step guides
Step-by-step help from our blog, written for the questions people ask most.
Your files stay on your device
This converter runs inside your browser, using your own computer or phone to do the work. The file is never uploaded to LeadCanal or anyone else, and nothing is saved on our servers. Close the tab and it is gone.
Each tool only opens the file types it is built for. We check the file extension and the first bytes of the file, so a renamed program or script is refused before it is opened.
Choose 300KB as the target and click Compress PDF. The tool lowers image quality step by step and gives you the best-looking version that is 300KB or less.
Yes, pick 100KB. For multi-page documents also turn on grayscale. If it still does not fit, upload fewer pages.
No. The compressed pages are images. Keep the original if you need to search or copy text.
Yes. The PDF is processed in your browser and never uploaded.
Further reading
- Mac Preview: reduce a PDF file size The built-in Mac option.
- Adobe Acrobat: optimize PDFs Acrobat Pro size reduction settings.
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