PDF tool
Compress PDF Online
Reduce PDF file size for email attachments, online forms, document portals, school submissions, business records, and office uploads. FileFixer AI compresses your PDF automatically and shows the required credits before processing starts.
Choose standard, strong, smallest file, grayscale document, or target file size compression.
Log in to process files and manage downloads. Free accounts are refilled to 5 credits each day.
Larger files, batch jobs, saved history, and advanced tools use credits. Required credits are shown before processing starts.
1 credit per page
Live tool flow
Estimate and process
Stronger PDF compression may reduce image quality or flatten scanned pages into compressed images. PDF compression uses 1 credit per page.
Fast file workflow
Upload, process, and download. No subscription required.
Upload a supported file, run the automated job, and download the result. Files are handled privately, results are fast, and downloads stay available from your dashboard.
Compress PDF under 1MB
Reduce scanned PDF size
Shrink PDF for upload portals
Example result
A typical PDF compression estimate.
Example only. Actual output size depends on images, scans, fonts, and whether the PDF has removable structure overhead.
Original
12 MB
Image-heavy PDF
Estimated output
4.8 MB
Using balanced compression
Estimated saving
60%
Shown before processing
Practical uses
PDF Compress for everyday file work.
Use this PDF compressor when upload portals, email attachments, and document systems reject large PDFs. Log in to process files and manage downloads. Free accounts are refilled to 5 credits each day, and credits are shown before processing.
Compress PDF for Upload Limits
Many websites, government portals, school systems, and business forms reject PDF files that are too large. Use FileFixer AI to reduce PDF size before uploading while keeping a downloadable PDF output.
Compress Scanned PDFs
Scanned PDFs and image-heavy reports are often much larger than normal text PDFs. Compression can reduce image size, optimize embedded content, and make the file easier to send or store.
Compress PDF for Email
Email services and company mailboxes often have attachment size limits. Compress large PDFs before sending invoices, reports, forms, drawings, certificates, receipts, or business documents.
Choose the Right Compression Level
Use standard compression for everyday documents, stronger compression for image-heavy files, and target file size options when a form or upload portal has a strict MB limit.
Related tools
Continue your file workflow.
Private processing
Your files are processed for your job only and available through private download links.
Fast downloads
Run the tool and get a downloadable output without unnecessary steps.
7-day dashboard access
Free job files are deleted after 24 hours. Paid results stay available in your dashboard for 7 days.
How do I compress a PDF online?
Upload your PDF, choose a compression mode, review the required credits, then process and download the compressed file from your dashboard.
Why did my PDF only reduce by a few percent?
Some PDFs already contain optimized text, vector graphics, or compressed images. These files may only reduce slightly. Scanned or image-heavy PDFs usually compress more.
What is the best compression mode for online forms?
Strong Compression or Target File Size is usually best for online forms with upload limits.
Can I compress a PDF under 1MB?
Use Target File Size and choose Under 1MB. Some PDFs may not reach the selected size without severe quality loss.
Will PDF compression change the layout?
FileFixer AI tries to preserve the original page layout. Stronger compression may reduce image quality, but the page structure should remain the same.
Does PDF compression keep selectable text?
For text-based PDFs, selectable text is preserved where possible. Stronger compression for scanned or image-heavy PDFs may rebuild pages as compressed images.
What is Grayscale Document mode?
Grayscale Document mode converts suitable scanned or image-based PDF content to grayscale. It is useful for forms, receipts, and paperwork, but not recommended for color designs or photo PDFs.
What happens if compression fails?
Reserved credits are released automatically if the job fails before output generation.