PDF Compressor
Use our free online PDF compressor to reduce PDF file size for job applications, government forms, email attachments, online portals, and faster downloads. Compress PDFs generally or target exact sizes depending on your upload requirement.
Max file size 50MB. Sign up for more.
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Checking files and selected compression settings.
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Create a free account to track usage, then upgrade for more monthly compressions and larger batch limits.
How to Compress PDF Files Online
PDF compression works differently from image compression. Most of the file size comes from embedded images, fonts, and metadata — our tool optimizes all three.
Select your PDF files — scanned documents, reports, presentations, or ebooks. Encrypted and password-protected PDFs are not supported.
Choose screen quality for email sharing (smallest), ebook quality for balanced results, or printer quality to preserve maximum detail. Each level adjusts embedded image DPI and font handling.
Download your optimized PDF with text, links, bookmarks, and form fields fully preserved. The document remains searchable and printable at your chosen quality level.
Why Choose Our PDF Compressor
Embedded images often account for 90%+ of PDF size. Downsampling high-res photos from 300 DPI to 150 DPI halves pixel count while staying sharp on screen.
A full font file can be 500 KB+. Subsetting keeps only the glyphs actually used in the document, often reducing font data to under 30 KB without affecting rendering.
PDFs carry hidden data: edit history, thumbnail previews, XML metadata, and duplicate objects. Stripping these can recover 5-15% of file size with no visible change.
Linearized PDFs rearrange internal objects so the first page loads instantly in a browser, without waiting for the entire file to download.
Most email providers cap attachments at 25 MB. Use screen-quality compression to get documents under the limit while keeping text perfectly readable.
Scanned PDFs are essentially large images. Compression can reduce a 20 MB scan to under 2 MB by downsampling to 150 DPI and applying JPEG compression to embedded images.
PDF Compressor FAQ
Quick answers about compression targets, upload limits, format behavior, and the best cases for compressing PDF files.
What is a PDF compressor?
Why do people compress PDFs online?
Will compressing a PDF reduce readability?
Can I compress PDF to exact sizes like 100KB, 200KB, or 1MB?
What types of PDFs compress best?
Can I batch compress PDF files online?
Is online PDF compression safe to use?
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