Private, browser-based PDF compressor
Compress PDF to 1MB Online
Set a 1MB maximum and compress your PDF in this browser tab. The file is not uploaded to a server.
Open the 1MB compressorCompress your PDF locally
The interactive compressor loads in this page. Files are processed in your browser and are not uploaded.
Selected target: 1MB. Actual output depends on the PDF and available browser memory.
A 1MB maximum for PDF uploads
Use this preset when the receiving form allows a file up to about 1MB. Upload rules can use different units or apply separate limits to each document.
- Verify whether the portal means 1MB or 1,000KB.
- Compare the result size with the limit displayed by the receiving service.
- Keep the original PDF for future edits or accessible text.
Frequently asked questions
Does my PDF leave my device?
No. PDF.js reads your file in this browser tab and the reduced PDF is assembled locally with pdf-lib. There is no upload endpoint, analytics event, account, or server-side file storage in this tool.
Will the result be exactly under my target?
Not always. A single maximum is best-effort: the tool tries the clearest setting first and uses the first attempt that fits, or the smallest attempt if none fit. The 100–200KB mode uses the clearest attempt in that interval when one exists.
Can I still select and search text?
The current reduction method rasterizes each page into an image. That usually makes a much smaller file, but it removes selectable, searchable text and original document structure. Keep the original if those matter.
What does the quality setting change?
Low keeps more visual detail and usually produces a larger file. Recommended is a practical middle ground. High uses smaller page renders and stronger JPEG compression for tight limits, with a greater chance of visible softness.
What PDFs work best here?
Short, image-heavy PDFs are the best fit. Very large or complex PDFs can use substantial browser memory, and a source that is already small may not shrink further.
Is 1MB exactly the same as 1,000KB?
Not always. Some systems use 1MB as 1,024KB, while others use decimal units. Follow the receiving portal's stated limit.