Compress PDF online
Make PDFs smaller for email, uploads, and sharing. Choose a compression level and download your files — free, no sign-up.
Smaller PDFs, easier sharing
Reduce PDF file size.
A scanned document or image-heavy presentation can be difficult to send. Compress your PDF to make it easier to upload, attach, and download. The reduction depends on the original file: a photo-heavy PDF may offer more room for savings than a short text document.
Choose size or quality.
Start with Balanced for everyday sharing. Try Smallest size when an upload limit matters most, or Best quality when fine details need more care. Review small text, diagrams, and photographs in the downloaded PDF before sending it.
Compress several PDFs together.
Add up to 25 PDF files and apply one preset to the batch. Each document stays a separate file with its own result and download. Prepare a set of reports, coursework files, or portfolio documents without repeating the upload process for every PDF.
Work without installing software.
Use this free PDF compressor from your browser without creating an account. Upload the documents, choose a preset, and download the results. Files are sent to a server for compression; this is an online service rather than an offline PDF editor.
How to compress a PDF
Upload your PDFs
Choose up to 25 PDF files, each under 50 MB, or drag them into the upload area.
Pick a preset
Start with Balanced, or choose Smallest size or Best quality to suit your document.
Compress the files
Click Compress and wait for each document to finish. Check the resulting file sizes.
Download and check
Save each compressed PDF. Open it to check the text and images before sharing.
Choose your compression level
| Preset | Best for | What to check |
|---|---|---|
| Smallest size | Upload limits and everyday screen viewing | Fine print and image detail may need closer inspection. |
| Balanced | Email attachments, reports, and general sharing | Check that text, charts, and photos remain clear. |
| Best quality | Detailed artwork, portfolios, and print proofs | The file may be larger; verify it meets your upload limit. |
PDF compressor FAQ
How do I reduce PDF file size?
Upload your PDF, choose a compression preset, and click Compress. Download the result and compare its size with the original. Start with Balanced; if the result is still too large, try Smallest size and inspect the quality.
Is this PDF compressor free?
Yes. You can compress PDFs and download the results for free without registering. The upload limits are 25 files per batch and under 50 MB per file.
Can I compress a PDF without losing quality?
There is no guarantee that every file will become smaller without visible changes. Compression can affect image detail. Choose Best quality when appearance matters most, keep your original, and inspect the result at the size you plan to view or print it.
Can I compress a PDF to 100 KB, 200 KB, or 1 MB?
The tool offers quality presets, not a target-size setting. You can try Smallest size and check whether the result meets your limit, but a particular KB or MB size is not guaranteed. A long, image-heavy document may need changes to its source content.
Can I compress multiple PDF files at once?
Yes. Upload up to 25 PDFs and choose a preset for the batch. Each document is processed separately and has its own download; the compressor does not merge them.
Which compression level should I choose?
Balanced is a useful starting point for general sharing. Smallest size prioritizes a smaller file, while Best quality gives more priority to appearance. The table above suggests what to check for each preset.
Why did my PDF barely get smaller?
A PDF may already be efficiently compressed, especially if it contains mostly text or previously optimized images. Different documents offer different savings. Repeated compression does not guarantee further useful reductions.
Are PDFs processed only on my device?
No. Your browser uploads the files to a server for compression and then retrieves the results. An internet connection is required. Do not treat this tool as an offline or device-only processor.
Can I compress a scanned PDF?
You can upload a scanned document saved as PDF. Results depend on the scan and preset. Review small characters, pale handwriting, diagrams, and other details after compression; the tool does not offer an OCR setting.
Will the result be small enough for email?
That depends on the PDF and your email service’s attachment limit. Check the downloaded size and include any other attachments in the total. Compression reduces file size when possible but cannot guarantee that every document will fit.
Does this tool edit, merge, or split PDFs?
No. It reduces file size and returns separate PDF downloads. To change wording, remove pages, merge files, or create a certificate layout, use a tool designed for that task.
Can I use compressed PDFs for print?
Try Best quality and inspect a sample print, particularly when a PDF contains fine lettering or detailed images. Keep the original file for final print production if the compressed version loses detail.