Compress PDF

Reduce PDF file size with the right preset for the job

A PDF that’s too large to email, too heavy to upload, or too slow to open on a phone is a PDF that doesn’t do its job. The OkFarsi Compress PDF tool shrinks files to a practical size without destroying the content. Instead of a single slider that guesses blindly, the tool offers balanced presets calibrated for real-world use: Screen (smallest, for web viewing), Ebook (medium, for email and mobile), Printer (high quality, for office printing), and Prepress (maximum quality, for professional print shops).

Compression happens in two layers. First, images inside the PDF are downsampled to a resolution suited to the preset you picked — 72 DPI for Screen, 150 DPI for Ebook, 300 DPI for Printer, 600 DPI for Prepress — and re-encoded with an efficient JPEG or lossless filter depending on the image type. Second, the file is optimized structurally: unused objects are stripped, font subsets are deduplicated, and cross-reference tables are rebuilt so the final PDF loads faster in every reader.

Unlike quick browser-side compressors that re-render everything to images, OkFarsi preserves the document’s logical structure. Text stays selectable, search still works, hyperlinks keep functioning, and the file remains accessible to screen readers. That matters for anything you plan to submit to a government portal, a publisher, or an accessibility-audited workflow — a PDF that looks fine visually but has been flattened to images can fail those checks.

Typical savings depend on the source. Image-heavy reports often shrink to 30–50% of their original size on the Ebook preset. Scanned PDFs (where every page is basically an image) can sometimes drop to a quarter of their original size with Screen. Born-digital text-only PDFs may not shrink as dramatically because there’s less fat to trim, but the structural optimizer still reclaims a meaningful percentage.

How to compress a PDF in 4 steps

1. Upload the PDF you want to compress

   Drag the file onto the upload area or click to browse. The tool reads the current file size and shows it above the preset picker so you can compare before and after.

2. Choose a compression preset

   Pick Screen for the smallest web-ready file, Ebook for balanced email-friendly output, Printer for office-quality print, or Prepress for professional print shops.

3. Press “Compress PDF”

   The tool uploads the file, runs a two-pass optimization (image downsampling, then structural cleanup), and shows live progress as the job runs.

4. Download and compare

   When the job finishes, the new file size is shown next to the original so you can confirm the savings before downloading. If the reduction isn’t enough, try a smaller preset.

Common use cases

• Email attachment limits

  Shrink a bulky proposal to fit under the 10–25 MB attachment ceilings enforced by Gmail, Outlook, and most corporate mail servers.

• Web uploads and forms

  Get a scanned passport or a signed contract below the upload limit of a visa portal, bank form, or tender platform without losing legibility.

• Mobile sharing

  Cut a 40 MB report down to a few megabytes so it opens instantly on a phone and doesn’t chew up the recipient’s cellular data.

• Long-term archiving

  Compress large scan collections before pushing them to cloud storage to reduce monthly storage costs without losing the ability to search and read.

Privacy & security

Your PDF is uploaded over HTTPS to an isolated processing worker. The source file and the compressed output are both removed from the server shortly after your download completes. We do not open, index, or store the contents of your document. Compression is a local server-side operation: no third-party cloud APIs are called, and the file never leaves our infrastructure. If you are compressing sensitive material such as contracts or medical records, the compressed output is exactly as private as the input; nothing new is exposed. As always, delete your local copy after archiving if the source is confidential.

Frequently asked questions