How much can I reduce my PDF file size?

It depends on the document content. PDFs with large images (scanned documents, photo-heavy reports) can typically be reduced by 60–90%. Text-heavy PDFs with few images may see a 10–30% reduction. The tool shows you the exact before-and-after file size so you can decide if the compression meets your needs.

Will compressing a PDF reduce the text quality?

No. Text, vector graphics, and document structure are compressed losslessly — they remain pixel-perfect. Only raster images (photos, scanned pages) are resampled, and you control the quality level. At the print preset, most users cannot distinguish the compressed version from the original.

Can I compress a PDF to a specific file size like 1 MB or 5 MB?

Yes. Use the target file size option to specify your desired maximum in MB. The engine will iteratively adjust compression settings to get as close to your target as possible while maintaining the best quality it can at that size.

Is it free to compress PDFs with dokk.ai?

Yes. The compression tool is free to use with no watermarks, no file size caps, and no registration. Premium plans offer higher daily usage limits and priority processing for heavy users.

Can I compress multiple PDFs at once?

Yes. Use our Batch Processing tool to apply the same compression settings to dozens or hundreds of PDFs in a single operation. Each file is compressed individually and available for download as a ZIP archive.

Does compression remove bookmarks, links, or form fields?

No. Dokk.ai preserves all interactive elements — bookmarks, hyperlinks, annotations, and fillable form fields survive compression. Only the optional metadata stripping removes editing history and hidden objects, not visible content.

Is it safe to compress PDFs online?

Yes. File transfers use TLS encryption. Your documents are processed on secure servers and automatically deleted after compression. We never read, analyze, or share your files. No account or personal data is required.

What is the difference between the compression presets?

Screen produces the smallest files (best for email and on-screen viewing). Ebook balances size and clarity for digital distribution. Print preserves detail for laser printing. High quality applies the lightest compression for archival or professional use. Choose based on how the document will be consumed.

Can I compress a scanned PDF?

Yes, and scanned PDFs usually benefit the most from compression because they consist almost entirely of large images. A 30 MB scan can often be reduced to 3–5 MB at the ebook preset with no noticeable quality loss for on-screen reading.

How do I compress a PDF on Mac or iPhone?

Open dokk.ai in Safari, Chrome, or any browser on your Mac or iPhone. Upload your PDF, choose a compression level, and download the result. No app installation is needed — the tool works entirely in the browser on any Apple device.

Wonke amathuluzi

Cindezela i-PDF

Nciphisa ubungako befayela

1Layisha

2Lungisa

3Cubungula

Drop file here

PDF, Word, Excel, PowerPoint, images up to 25 MB

Izici ezibalulekile

Four compression presets — screen and ebook and print and high quality
Target file size mode — compress to a specific MB limit automatically
Intelligent image downsampling without visible quality loss
Duplicate resource removal — merge redundant fonts and profiles
Metadata stripping — remove editing history and hidden objects
Lossless compression for text and vector graphics
Preserves hyperlinks and bookmarks and form fields and annotations
Manual control over image quality and DPI resolution
No watermarks added to the output
No registration or account required
Works on any device — desktop and tablet and mobile
TLS encryption and automatic file deletion after processing

Izimo zokusetshenziswa

Reducing a 50 MB report to under 10 MB for email attachment limits
Compressing scanned documents with large images for cloud storage
Making grant applications uploadable to submission portals with 5 MB limits
Optimizing product catalogs for fast loading on websites
Shrinking presentation PDFs before sharing in Slack or Teams
Compressing archived documents to save long-term storage costs
Reducing insurance claim PDFs for mobile upload in field work
Preparing compressed portfolios for online job applications
Shrinking photo-heavy real estate listings for MLS upload
Batch compressing hundreds of invoices for accounting archive

Indlela yokusetshenziswa

1Upload the PDF you want to compress by dragging it into the upload area or browsing your device
2Select a compression preset (screen, ebook, print, or high quality) or set a specific target file size in MB
3Optionally enable metadata stripping for additional size reduction beyond image compression
4Click Compress and wait a few seconds while the engine optimizes your file
5Download your compressed PDF — the tool shows you the original and new file size so you can verify the reduction

Your PDF is too large to email. The portal rejects it. Cloud storage is filling up. Sound familiar? Large PDFs are one of the most common document headaches — email servers reject attachments over 10 or 25 MB, web portals impose strict upload limits, and recipients get frustrated waiting for oversized files to download. Dokk.ai's free online PDF compressor solves this in seconds: reduce PDF file size by up to 90% without visible quality loss, or compress to a specific target size like 1 MB, 5 MB, or 10 MB. Our tool analyzes your document structure and applies the optimal combination of reduction strategies. High-resolution images are downsampled to a resolution appropriate for the intended use — screen viewing, ebook distribution, or professional printing. Duplicate embedded resources such as fonts and color profiles are merged. Hidden metadata, editing history, and unused objects are stripped. The result is the smallest possible file that still looks sharp and professional. Choose from four compression presets to match your needs. Screen quality produces the smallest files — ideal for on-screen viewing and email. Ebook quality balances size and clarity for digital distribution. Print quality preserves image detail for documents destined for a laser printer. High quality applies the lightest compression, reducing size while keeping near-original fidelity for archival or professional publishing. If none of the presets are right, configure image quality and resolution manually, or set a target file size in MB and let the engine iterate until it reaches your goal. The compression is lossless for text, vector graphics, and document structure. Only raster images are resampled, and you control exactly how aggressively. Fonts remain embedded and readable. Hyperlinks, bookmarks, form fields, and annotations survive the compression intact. The output PDF is fully compatible with every PDF viewer — Adobe Acrobat, Preview, Chrome, Firefox, and all mobile readers. Dokk.ai works on every device and operating system. Compress PDFs on Windows, Mac, Linux, iPhone, or Android — all you need is a browser. There is nothing to install or configure. Your files are encrypted during transfer and automatically deleted from our servers after processing. We never read or store your documents. Need to compress multiple files at once? Use our Batch Processing tool to apply the same compression settings to dozens or hundreds of PDFs simultaneously. After compressing, use Merge PDF to combine files, or Add Page Numbers for a finishing touch. Dokk.ai gives you a complete document workflow, not just a single-purpose compressor.

Imibuzo ebuzwa njalo

Ukuphepha nobumfihlo

Your files are protected with TLS encryption during upload and download. All documents are automatically deleted from our servers after compression is complete — we never store, read, or share your files. No account is required. Dokk.ai processes your documents in isolation and treats your privacy as a core commitment.