Compress PDF
Reduce the file size by re-optimizing its content.
How to compress a PDF and reduce its size online
Upload the PDF you want to compress
Drag your file or click to select it. The compressor analyzes the content (text, images or scans) to work out how much the PDF's size can be reduced without losing visual quality.
Let the tool optimize the file
In seconds, the PDF is re-optimized to lower its size. The content isn't rewritten or edited: only the file size is reduced, ideal for attaching to an email or uploading to a website.
Download your compressed PDF
You'll see how much the size has dropped in KB or MB before downloading it. The whole process of compressing your PDF happens in your own browser, without uploading the file to any server.
Why compress your PDFs on PDFDocks?
Large PDF files are inconvenient: slow to email, difficult to share, they consume storage space. Compression helps, but typical online tools upload your document to a server where quality might be lost. PDFDocks compresses PDFs right in your browser using JavaScript—no server involved, your privacy stays intact, and you control the quality/size tradeoff.
How much can I reduce a PDF?
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Compression typically reduces file size by 30-70%, depending on the PDF's content. Images and color information compress better than scanned text.
Will compression lose image quality?
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PDFDocks uses smart compression that balances file size with quality. You can choose your preferred quality level—higher quality keeps more detail but results in larger files.
Is my PDF private during compression?
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Yes, absolutely. All compression happens locally in your browser. Files never leave your device and are never seen by our servers.
Can I compress scanned PDFs?
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Yes. Scanned documents often compress well because they contain large blocks of similar colors. PDFDocks handles them efficiently.
How long does compression take?
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It depends on file size, but since processing is local, it's typically very fast—usually under a minute for most files.
Do I need an account?
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No account required. PDFDocks is free and anonymous. Upload your PDF, select compression level, and download the result instantly.
Tools
Merge PDF
Combine several PDFs into one file, in any order you like.
Split PDF
Extract specific pages or split your PDF into ranges.
Rotate PDF
Rotate the pages you need, one by one or all at once.
PDF to images
Convert every page into a high-quality PNG image.
Images to PDF
Combine your photos or images into a single PDF document.
Watermark
Add overlay text to every page of your PDF.
Protect PDF
Add a password to restrict access to the file.
Unlock PDF
Remove the password from a PDF if you know it.
Remove pages
Delete the pages you don't need from your PDF document.
Extract pages
Select and save only the pages you need.
Reorder PDF
Freely reorganize, move or rearrange the pages in your document.
Crop PDF
Remove margins or adjust the visible area of the page.
Page numbers
Add page numbering with custom position, style and font.
Fill PDF forms
Detect fields and fill in existing PDF forms.
Sign PDF
Draw your signature and stamp it onto any page of the document.
Scan to PDF
Capture documents from your phone and send them straight into a PDF.
OCR PDF
Turn scanned PDFs into documents with selectable, searchable text.
PDF to Markdown
Extract your PDF's content into editable Markdown text.
Word to PDF
Convert Word (.docx) documents into PDF format.
Excel to PDF
Turn Excel spreadsheets (.xlsx) into PDF documents.
Compare PDF
Place two versions of a PDF side by side to spot the differences.
Redact PDF
Permanently cover up text or graphics containing sensitive information.
Repair PDF
Attempt to recover and fix damaged or corrupted PDF files.
JPG to PDF
Convert one or several JPG photos into a single PDF document.
PNG to PDF
Convert one or several PNG images into a single PDF document.
PDF to JPG
Convert every page of your PDF into a JPG image.
PDF to PNG
Convert every page of your PDF into a high-quality PNG image.
WEBP to PDF
Convert one or more WEBP images into a single PDF document.
PDF to WEBP
Convert each page of your PDF into a lightweight, high-quality WEBP image.
PDF to Word
Extract text from your PDF into an editable Word document (.docx).
PDF to Excel
Extract text and tables from your PDF into an Excel spreadsheet (.xlsx).
HEIC to PDF
Convert one or multiple HEIC photos (iPhone format) into a single PDF document.
EML to PDF
Convert an email (.eml) into a PDF document, including sender, recipient, subject, and message body.
MHT/MHTML to PDF
Convert a web page saved in MHT or MHTML format into a PDF document.
