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Compress PDF Online for Free

Make a PDF easier to share, email, or submit — with no sign-up or usage limit.

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Drop a PDF to compressYour file is processed only on your device.

COMPRESS PDF GUIDE

Reduce PDF file size before email or upload

Large PDFs can be difficult to email or may exceed an upload form’s limit. Start with recommended compression, then check the downloaded PDF’s size and readability before you submit it.

Choose the right approach

Important: check the result

File-size reduction depends on the original PDF. This tool does not promise a specific target such as 1MB or 5MB. Open the result and zoom in on small text, signatures, and scanned pages before sending it.

Frequently asked questions

Can I compress a PDF to a fixed size?

Every PDF is different, so a fixed output size cannot be guaranteed. Try the available levels and check the downloaded file size.

Should I compress the result again?

For the best quality, retry from the original PDF rather than repeatedly processing an already compressed file.

Related guides and tools

How to reduce a PDF below 5MB →Merge PDF files →Convert PDF to JPG →

PRACTICAL PDF SIZE GUIDE

Check these limits before reducing a PDF file size

PDF upload limits vary, often 1MB, 5MB, or 10MB. Check the destination rule first, then review both the downloaded file size and the readability of small text, stamps, tables, and scans.

Under 1MB

For strict application limits. Always confirm the final file size.

Under 5MB

A common limit for general portals and email attachments. Start by comparing recommended compression.

Under 10MB

Often used for scanned or photo-heavy submissions. Readability checks are especially important.

A quick check before submitting

  1. Check the destination’s maximum size and PDF-format requirements.
  2. Keep the original PDF and start with recommended compression.
  3. Confirm that the downloaded result is below the stated limit.
  4. Open the first, middle, and last page and zoom in on text, stamps, tables, and photos.
  5. If it is still rejected, also check password protection, page limits, and total attachment limits.

Frequently asked questions

Can I make a PDF exactly 1MB or 5MB?

Reduction varies with the PDF structure and included images, so an exact output size cannot be guaranteed. Check the actual downloaded size.

Why does my PDF barely get smaller?

Already optimized or text-heavy PDFs can have little removable data.

Does compression change my original PDF?

No. Compression creates a separate new PDF and keeps the original file unchanged.

Related PDF tools and guides

Compress PDF to 1MB→Compress PDF to 5MB→Compress PDF to 10MB→PDF too large to upload? Fix the size error→How to reduce PDF file size→

CHECK THE RESULT SIZE

PDF compression results depend on what is inside the document

A text- and vector-based PDF may shrink when its save structure is optimized, while a scan full of images may change very little. If a portal has a 1MB or 5MB limit, check both the final size and whether small text, stamps, and tables remain readable.

A safe workflow

  1. Check the upload limit first.
  2. Compare the original and result in MB or KB.
  3. Open and zoom in on important pages before submitting.

If compression does not work

Password-protected or damaged PDFs may not be processed. Confirm that the PDF opens normally first.

Frequently asked questions

Can you make it exactly 1MB?

Exact size depends on the document and embedded images, so it cannot be guaranteed. Leave a margin below the upload limit.

Does this replace my original?

No. Optimization creates a new PDF file.

Can I compress password-protected PDFs?

Files that are protected or do not open normally may not be processed.

Reduce PDF size under 1MB →Merge PDFs →