Email attachments
Compress PDFs before sending reports, invoices, assignments, resumes, or proposals.
🗜 PDF size optimizer
Compress PDF Online Free and Reduce File Size
Reduce PDF size with browser-based optimization, batch uploads, metadata cleanup, size comparisons, and ZIP download. This is especially useful for everyday PDFs that need to be easier to email, upload to forms or portals, archive in smaller copies, or share without running into file-size limits.
🔒 Private in-browser📦 Batch support💾 ZIP download
PDF Compressor Tool
Upload PDFs, choose an optimization mode, optionally remove metadata, and download optimized files.
Actual size savings depend on how the PDF was created.
Can clear title, author, subject, keywords, creator, and producer fields when supported.
Common Ways People Use This Tool
Upload limits
Try reducing file size before uploading PDFs to portals, application forms, or learning platforms.
Batch cleanup
Optimize several PDFs together and download one ZIP instead of processing each file manually.
Worked Examples
Example 1: Compress one report
Upload a PDF report, choose Balanced optimization, run the tool, and download the optimized copy.
Example 2: Batch compress documents
Select several PDFs, remove metadata if needed, then download all optimized files together as a ZIP.
Example 3: Clean metadata before sharing
Enable metadata cleanup when you want to reduce extra document information before sending a file externally.
How This PDF Compressor Works
The tool loads each PDF in your browser, rebuilds the document structure, optionally removes common metadata fields, and saves a fresh optimized copy. It then compares the original and processed file sizes so you can see whether the output is smaller before downloading.
This workflow is useful for PDFs that carry extra structural overhead, repeated document objects, unnecessary metadata, or export bloat from other software. It is fast and privacy-friendly for everyday office files, reports, forms, guides, assignments, and shared documents that need easier email or portal upload.
It is important to know that this is not the same as aggressive image recompression. If a PDF is mostly made from large scanned images or already optimized content, the size reduction may be small. When you process several files, the tool keeps the workflow organized with individual download links and one ZIP package for faster batch delivery.
More Useful PDF Tools
Merge before compressing
Use Merge PDF first if several PDFs should become one smaller shareable file.
Split large PDFs
Use Split PDF when only selected pages need to be shared.
Add labels after cleanup
Open Add Watermark to PDF when the compressed file needs DRAFT, CONFIDENTIAL, or SAMPLE text.
What to Know About PDF Compression
PDF files can be large because of embedded images, scanned pages, unused document objects, metadata, fonts, or repeated content. Browser-based optimization can clean and rewrite document structure, but it may not heavily reduce image-heavy files without changing the images themselves.
When this tool works best
It works best on PDFs with extra structure overhead, metadata, duplicated document objects, or files exported with unnecessary data. It is especially practical for reports, exported forms, digital handouts, invoices, and document packets that are slightly too large for upload or email.
When size reduction may be small
If a PDF is already optimized or mostly made from large scanned images, the output may only be slightly smaller. Splitting pages, compressing source images before PDF creation, or removing unnecessary pages may help more than structure cleanup alone.
Who this tool helps
This page is useful for students, office teams, freelancers, agencies, and anyone who needs a quick online PDF compressor for attachments, form submissions, document archiving, or sharing through systems with file-size limits.
Searches this tool helps with
This page is useful for people searching for compress PDF online, reduce PDF size, PDF compressor free, shrink PDF file, optimize PDF online, and batch PDF compressor.
Frequently Asked Questions
Answers about PDF compression, privacy, batch files, metadata cleanup, visual quality, ZIP downloads, and small size reductions.
Upload one or more PDF files, choose an optimization mode, optionally remove metadata, and click Compress PDFs. After processing, download each compressed PDF or download all files as a ZIP.
Yes. This PDF compressor is free to use online without signup.
Yes. You can upload multiple PDF files and process them in one batch, then download individual files or all results together as a ZIP.
No. The compression workflow runs in your browser, which helps keep your PDF files private on your device.
Some PDFs are already optimized. Scanned or image-heavy PDFs may need dedicated image recompression, so browser-based structure optimization may only reduce size slightly.
It attempts to clear common PDF metadata fields such as title, author, subject, keywords, creator, and producer before saving the optimized file.
This browser tool focuses on PDF structure optimization and metadata cleanup. It does not intentionally lower image resolution, so visual quality usually stays the same.
Yes. After batch processing, the page creates a ZIP download that contains all successfully compressed PDFs.