FormatOwl.
Credits & pricing

Compress PDF

Reduce PDF size with light, balanced or strong compression. Preview pages, retain existing text and structure, and download individually or in a ZIP.

01

Upload

Drop your files here

PDF

Up to 20 files per batch · 50.0 MB per file

FREE PREVIEW · NO CREDITS

PDF compression

Adjust settings after loading. Processing follows current credit rules and will not start automatically.

02

Settings

Compression preset

Keep text and page structure. No OCR is added. Encrypted and digitally signed PDFs are not supported yet.

Estimated cost: Choose a file to estimateRemaining —
Indicative estimate · Full price unverified

Based on size, duration, pixels, pages and settings. Batches show a total. ≈ is indicative; + means only part of the cost is included. The server quote after analysis takes precedence.

Resource budgets are not verified prices. Confirm a maximum before paid processing; unused reservations are returned.

View credits and billing rules

Private files. Automatically deleted after 24 hours, or delete them whenever you like.

Formats and limits

Input
PDF
Output
PDF

Up to 50 MiB and 1,000 pages per file, 20 files per batch. Encrypted and digitally signed PDFs are rejected.

How to use this tool

  1. Choose up to 20 supported files. Every file in the batch uses the same settings.
  2. Adjust the settings and start processing. Keep the page open until uploading finishes.
  3. Preview the results, download individual files, or create a ZIP of successful results.

Settings and results

Light optimizes structure. Balanced and Strong also optimize supported embedded images. Existing text is kept; compression does not add OCR to a scanned document.

File storage and deletion

Files are uploaded and processed on the server. Originals and results are stored privately and accessed through their account or browser session; downloads use short-lived links. By default, files expire 24 hours after upload and are removed by the cleanup process. You can delete them earlier in your workspace. The current local default allowance is 20 uploaded files per 24 hours.

Read the usage and data guide

Common questions

Why did the PDF not become smaller?

Text-heavy or previously optimized files can offer little room for compression. Unsupported image structures are preserved. If the result is not smaller, FormatOwl returns the original.

Does this certify PDF/A or preserve every interactive feature?

No. Review forms, colors and important pages after processing. Compression does not provide PDF/A recertification or guarantee every special interactive feature.

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Helpful guides