Use our free online PDF compressor to reduce PDF file size instantly — no signup, no watermark, no software to install. Upload one or multiple PDFs, pick a compression level, and download your smaller files in seconds. Perfect for email attachments, government portals, and cloud storage.
Drop PDF files here
or
Supports multiple files
Not sure? Start with Medium — it works well for most PDFs.
🔒 Your files are processed securely. Uploaded PDFs are automatically and permanently deleted from our servers within 2 hours. We never store or share your documents.
Compress as many PDFs as you need — no daily limits, no subscription required.
Server-side Ghostscript compression processes your files in seconds, not minutes.
Files are permanently deleted from our servers within 2 hours. No data is shared.
Compress multiple PDFs at once and download them all together as a single ZIP file.
Fully mobile-responsive. Works on Android, iPhone, tablet, and all desktop browsers.
Choose from Low, Medium, High, or Very High compression to balance quality vs size.
Follow these simple steps to reduce your PDF file size for free:
Click "Choose PDF Files" or drag and drop your PDF files directly onto the upload area.
Select a compression level — Medium is recommended for most documents.
Hit the "Compress PDF" button. Your files are sent securely to our server for processing.
See before/after sizes for each file, then download individually or as a ZIP archive.
PDF files are the standard for sharing documents online — from invoices and contracts to resumes, application forms, and scanned records. But PDFs can quickly become oversized, making them hard to email, upload, or store. A reliable online PDF compressor solves this instantly.
Most PDF size issues come from embedded high-resolution images, embedded fonts, duplicated image resources, and metadata left over from the application that created the file. Scanned documents are especially large because every page is stored as a full-resolution image. Compression removes this unnecessary data while keeping the document readable.
If you need to hit a specific file size target — like 100KB for a government portal or 200KB for a job application form — start with High or Very High compression. Check the results table after compressing to see the new file size. If it's still too large, your PDF likely contains many high-resolution scanned images. In that case, consider reducing the number of pages or lowering image resolution before uploading.
For documents where visual clarity matters — legal contracts, portfolios, certificates — use Low or Medium compression. These levels reduce file size by 10–50% with minimal visible quality change. Text-heavy PDFs typically compress very well even at medium levels because the compression targets image data rather than text.
Instead of compressing files one by one, Devine Tools lets you upload and compress multiple PDFs in a single batch. After compression, you can download all results together as a ZIP archive — ideal for professionals managing invoices, reports, or client documents in bulk.
Yes. Your files are uploaded over a secure HTTPS connection and processed on our server using Ghostscript, a trusted open-source PDF engine. Temporary files are automatically and permanently deleted within 2 hours. No account is needed, and we never store, read, or share your documents.
For highly sensitive documents (e.g., legal or medical records), we recommend using a private or trusted network and deleting your local copy after downloading if no longer needed.
Very high compression can visibly degrade image quality — especially in scanned documents with small printed text. For archival documents, legal files, or anything you plan to print professionally, stick to Low or Medium compression to preserve legibility. Always preview the result before sharing important documents.
Students uploading assignments and job seekers submitting resumes frequently hit file size limits on submission portals. Compressing your PDF before uploading ensures your documents go through without errors — and doesn't affect how they look when opened by the recipient.
Yes. Devine Tools uses Ghostscript — a well-established, open-source PDF processing engine — to handle all compression server-side. Your files are uploaded via HTTPS, processed, and then automatically deleted from our servers within 2 hours. No registration is required and we do not retain, sell, or access your documents.
Upload your PDF using the tool above, select a compression level, and click "Compress PDF". Once processed, download your smaller file — no account or payment required.
It depends on the PDF content and compression level. Image-heavy or scanned PDFs can be reduced by 60–90%. Text-based PDFs typically reduce by 20–50%. The results table shows the exact percentage saved for each file.
Yes — use Low or Medium compression. These levels remove unnecessary metadata and optimize image data with minimal visible change. Text remains sharp and readable.
Try High or Very High compression first. If the result is still too large, the PDF likely contains many high-resolution images. You may need to reduce the number of pages or re-export the document at a lower image resolution before compressing.
Yes. You can select multiple files at once or drag and drop several PDFs into the upload area. After compression, download all files individually or as a single ZIP archive.
Password-protected or encrypted PDFs may fail to compress. Please unlock the PDF first using our Unlock PDF tool, then compress it.
Yes. The interface is fully mobile-responsive and works on modern iOS and Android browsers including Chrome, Safari, and Firefox — no app download needed.
The tool handles standard PDF files up to the server upload limit configured for your site. For very large files (50MB+), compression may take a few extra seconds.
After compressing your PDF, you might also need these free tools:
Free, instant, no signup — compress your PDF in seconds and share with confidence.