Compress PDF
Reduce PDF file size by compressing embedded images for easier storage and transfer
or drag and drop files here
Upload a PDF file
Instructions
- Compression mainly targets images within the PDF. Text is not affected
- Compression ratio varies by content. Text-only PDFs have limited compression potential
- Processing is done locally in your browser. Files are never uploaded
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Compress PDFs without losing quality
Need smaller files or batch compression? PDFelement optimizes PDFs while keeping text sharp and images clear.
What you should know
PDF compression works by re-encoding embedded images and cleaning redundant metadata. Pure text PDFs are already highly optimized, so the biggest wins come from scanned documents and image-heavy files.
- Scanned PDFs compress the most — often 50–80% smaller because they contain full-resolution bitmaps.
- Text-only PDFs see limited reduction — usually 0–10% because the text is already stored efficiently.
- Your file never leaves the browser — all compression happens locally on your device.
Read the full PDF compression guide →
This batch tool processes multiple PDFs at once, applying the same operation to every file you upload. It runs entirely in your browser — files are never sent to a server — and results are packaged for easy download.
- Upload multiple files — drag and drop a folder or select individual PDFs to process in one go.
- Same settings for all files — configure the operation once and it is applied uniformly across the batch.
- Results packaged for download — processed files are bundled into a ZIP archive for convenience.
About Compress PDF
PDF compression is one of the most common document tasks online. Whether you are trying to email a large report, upload a resume to a job portal, or save storage space on your device, reducing PDF size makes files easier to share and store. A good PDF compressor re-encodes embedded images and removes redundant metadata without changing the text or layout of the document.
The size of a PDF depends heavily on what is inside it. Scanned documents and image-heavy files are usually the largest, because every page is stored as a full-resolution bitmap. Text-only PDFs, by contrast, are already highly optimized, so they have less room for reduction. This means the compression ratio you see depends on the source file, not just the tool settings.
Browser-based compression has a clear privacy advantage over cloud converters. Your file never leaves your device, so contracts, medical records, financial statements, and other sensitive documents stay local. This is especially important for users who do not want to trust a third-party server with confidential information.
When choosing compression strength, think about where the file will be used. A lower quality setting produces a much smaller file but may introduce visible artifacts in photos and diagrams. A higher quality setting keeps images clearer but reduces size less. For most professional documents, a middle setting gives the best balance between readability and file size. After compressing, you can merge the PDF with other documents or split it into smaller parts.
If you need advanced compression, OCR, batch processing, or precise control over image resolution, a desktop PDF editor like Wondershare PDFelement offers more powerful options. For quick, private, everyday compression, a browser-based tool is often enough.