Compress PDF
Compress and reduce your PDF file size for email or upload.
Choose PDF Files
or drag and drop them here
How to use Compress PDF?
- Add a PDF that is too large to email, upload, or store. Use the cleanest version you have, especially for scans or client files.
- Choose light, medium, or high compression depending on the quality you need. Take ten seconds here; most PDF mistakes are order, range, or quality mistakes.
- Click Compress PDF and let RashPDF prepare a smaller PDF file.
- Open the result once before sending it. If it looks right, download it or continue with the next PDF tool.
- Reduces file size for email attachments and web portals.
- Keeps text readable while optimizing heavy images.
- Helps large PDFs upload faster on slower connections.
File details, settings, and quality checks
A useful result depends on the source file and the choices made before processing. Use these tool-specific checks before you download or share the output.
- Accepted input
- a PDF that is too large to email, upload, or store
- Result
- a smaller PDF file
- Setting to review
- choose light, medium, or high compression depending on the quality you need
- Best-result check
- Start with medium compression for a good balance, then use high only when the file still exceeds a strict limit. Text remains sharp; image-heavy PDFs may show more visible reduction when high compression is selected.
- Processing and privacy
- The workflow is designed for browser-based processing where possible, so you can review the result before saving or sharing it.
Once the result looks right, you can merge compressed files, protect them with a password, or share them by link. Keep the source file until the downloaded version has opened correctly.
Frequently Asked Questions
How do I compress a PDF?
Upload your PDF, choose a compression level, click Compress, and download the smaller file.
How much will the file size reduce?
Typically 50 to 80 percent. Image-heavy PDFs compress more than text-only files.
Does compression affect text quality?
No. Text remains fully sharp and readable at all compression levels. Only image quality may reduce slightly at high compression.
What compression levels are available?
High for maximum size reduction, Medium for balanced quality and size, and Light for minimal quality change. Medium is recommended for most uses.
Is there a file size limit?
Yes. Files up to 100MB can be compressed.
Is compression free?
Yes. The PDF compressor is completely free with no registration needed.
Who usually needs Compress PDF?
Compress PDF is most useful for office workers sharing reports, students submitting files online, and anyone dealing with size limits. It is for everyday document work: fix the file, check the result, and move on without opening a heavy desktop app.
What should I check before using Compress PDF?
Make sure a PDF that is too large to email, upload, or store is the final version you actually want to process. For private, legal, financial, or client files, check the output before you forward it.
Which setting matters most?
Most mistakes happen when users skip this part: choose light, medium, or high compression depending on the quality you need. Review page order, page range, orientation, and quality before starting the job.
Will Compress PDF change my original file?
No. RashPDF creates a smaller PDF file as a new file. Your original stays where it is unless you decide to replace it yourself.
How do I get the best result from Compress PDF?
Start with medium compression for a good balance, then use high only when the file still exceeds a strict limit. Text remains sharp; image-heavy PDFs may show more visible reduction when high compression is selected. For anything important, open the downloaded file once before submitting, printing, archiving, or forwarding it.
Can I use the output with other RashPDF tools?
Yes. After using Compress PDF, you can merge compressed files, protect them with a password, or share them by link. The workflow is designed for browser-based processing where possible, so you can review the result before saving or sharing it.
About Compress PDF
Compress and reduce your PDF file size for email or upload. Free online PDF compressor — shrink large PDFs while keeping text and images clear.
Start with a PDF that is too large to email, upload, or store, then choose light, medium, or high compression depending on the quality you need. That one review step matters more than it looks: wrong page order, missed ranges, sideways scans, and low-quality source files are the usual reasons people have to redo a PDF job.
The workflow is designed for browser-based processing where possible, so you can review the result before saving or sharing it. RashPDF returns a smaller PDF file, so your original file is not overwritten. Text remains sharp; image-heavy PDFs may show more visible reduction when high compression is selected.
Afterward, open the downloaded file once. If it is ready, you can merge compressed files, protect them with a password, or share them by link. This keeps the workflow natural: fix the document first, polish it second, and share it only after the final check.
Step-by-step guide
How to Compress PDF Files Without Losing Quality