Can I compress a PDF to 100 KB, 200 KB, 500 KB, or 1 MB?
You can try Maximum Compression, but the tool does not promise an exact target size. The final result depends on the number of pages, image resolution, and existing PDF structure.
Compress PDF Online for Email and Uploads
Make large PDFs easier to email, upload, and store. Add one or more files, choose the right balance between file size and image quality, and download a smaller copy. Your original PDF is not overwritten. The biggest savings usually come from scanned pages, photographs, and image-heavy presentations; text-only or already-optimized PDFs may become only slightly smaller.
- 1
Add your PDF files
Drag and drop one or more PDFs into the queue, or select them from your device.
- 2
Choose a quality level
Use the Quality slider or choose Maximum Compression, Balanced, or Maximum Quality.
- 3
Name the output file
Enter a new filename if needed. Your original PDF is not overwritten.
- 4
Compress and review
Click Compress PDF, compare the size and visual result, then download the smaller copy.
Practical uses
Use PDF compression when an email attachment is too large, a job application or government portal has a file limit, or a document needs to load faster on the web. If a portal requires a file under 100 KB, 200 KB, 1 MB, or 5 MB, try Maximum Compression and check the actual exported size before submitting.
Tips for a better result
- Use Balanced for most reports, resumes, forms, and everyday email attachments.
- Choose Maximum Quality for printing, portfolios, detailed diagrams, or photographs.
- Keep the original PDF and inspect small text, signatures, numbers, links, and page order before sharing the compressed copy.
- For a batch of files, review each result individually before downloading the ZIP archive.
Frequently asked questions
How do I compress a PDF without losing quality?
Start with Balanced. If the result needs to look sharper, choose Maximum Quality. Compression affects image resources more than native text and vector content.
Will compressing a PDF make it blurry?
Lower settings can reduce the sharpness of photographs or scanned pages. If the result looks soft, move the slider toward Maximum Quality and export again.
Why did my PDF barely get smaller?
The PDF may already be optimized, or it may contain mostly selectable text and vector graphics. In that case, there may be little safe data to reduce.
Can I compress a scanned PDF?
Yes. Scanned PDFs often contain large page images and may offer the greatest opportunity for size reduction. Check fine print and signatures after exporting.
Will the compressed PDF remain searchable?
If the original contains selectable text, searchable content is generally preserved by structure-preserving compression. An image-only scan does not become searchable through compression alone.
Can I compress several PDFs at the same time?
Yes. Add multiple PDFs to the queue, compress them separately, and download completed files individually or with Download All as ZIP.
Can I compress a password-protected PDF?
Protected files may need to be unlocked before compression. Use the authorized password with the PDF Unlock tool first.
Will compression change the page layout?
The compressor is designed to keep page dimensions, page order, and visible layout unchanged. Review the exported PDF before printing or submitting an important document.
Are my PDFs uploaded to a server?
The supported compression workflow processes selected files in your browser. See the Privacy Policy for normal website requests and other data practices.
Choose the right PDF compression level
The Quality slider controls how strongly the compressor optimizes embedded images and scanned pages. It is a quality preference, not a guaranteed final file-size target.
| Setting | Best for | Effect on images | Text and layout |
|---|---|---|---|
| Maximum Compression (1–49%) | Strict upload limits and smaller attachments | Stronger image reduction; photos and scans may look softer | Structure-preserving strategies are used when possible |
| Balanced (50–74%) | Everyday sharing, resumes, and reports | Moderate reduction with good visual clarity | Usually the best balance for readable documents |
| Maximum Quality (75–99%) | Printing, portfolios, diagrams, and detailed scans | Preserves more image detail | Best choice when visual quality matters most |
Compress scanned PDFs for portals and email
Scanners often save each page as a high-resolution image, which can make a document much larger than expected. Compression reduces unnecessary image data while keeping page boundaries and readable content intact where the selected strategy supports it.
If a portal has a strict limit, use Maximum Compression first, then open the result and check fine print, signatures, tables, and numbers. If the file is still too large, the source document may need fewer pages or lower-resolution images before compression.
Batch compress multiple PDF files
Add contracts, receipts, applications, or project documents to the queue and work through them in one session. Each file can be reviewed and compressed from its own workspace. Download successful files individually or use Download All as ZIP when the batch is complete.
Browser-based PDF compression
The supported compression workflow processes selected files in your browser. FlamePDF creates a new exported PDF and does not overwrite the original file. Keep the source document and review the result before using it for a formal submission.