Picovert

PDF Compressor

Reduce PDF file size in your browser. No upload, no sign-up.

No Data Collection

No database, no accounts. We literally can't see your images.

Blazing Fast

Native browser processing — no upload, no waiting.

100% Free

No limits, no watermarks, no hidden fees. Ever.

No Account Required

Sign in? Never. Just open the tool and use it.

Reducing PDF File Size

Why PDFs become oversized

Most large PDFs are heavy because of the images inside them. A document full of high-resolution scans or photos can easily exceed the size limits of email attachments and upload forms, even when the text itself takes up almost no space.

Compressing a PDF re-optimizes those embedded images so the whole document becomes lighter, while the layout, text, and page order stay exactly as they were.

How compression keeps documents readable

Picovert reduces PDF size primarily by recompressing the images it contains to a sensible quality, which is usually invisible at normal viewing and printing sizes. Text remains crisp because it is stored as vectors, not pixels, so it is unaffected by image compression.

The goal is the smallest file that still looks right — small enough to email or upload, yet clear enough to read and print.

Private compression for sensitive documents

PDFs frequently contain contracts, invoices, tax forms, and medical records — exactly the documents you should not upload to an unknown server. Picovert compresses your PDF entirely within your browser, so confidential pages never leave your device.

If you assembled the PDF from images, you can do the whole workflow privately: combine with the image-to-PDF tool, then compress here, all without an upload.

How to Compress PDFs Free Online

1

Upload Your PDF

Drag and drop a PDF file or click to browse. Up to 10 files, 50 MB each.

2

Automatic Compression

Picovert removes redundant data and compresses object streams entirely in your browser. No upload required.

3

Download Compressed PDF

Download the compressed PDF instantly. The file is smaller and fully compatible with all PDF readers.

Frequently Asked Questions

How much can I reduce a PDF's file size?+
Results vary by PDF type. Structure-heavy PDFs (forms, text documents, complex layouts) typically see 10–50% reduction. Image-heavy PDFs may see more modest gains since images are already compressed.
Does PDF compression affect text quality or searchability?+
No. Picovert compresses the PDF's internal data structures without re-encoding text or vector graphics. Your text remains fully searchable and sharp.
Are my PDF files uploaded to a server?+
No. All compression happens locally in your browser using pdf-lib. Your files never leave your device — not even temporarily. This makes it safe for confidential documents.
What types of PDFs compress best?+
PDFs with complex object structures, duplicate streams, or uncompressed metadata compress the most. Simple single-page image PDFs may see minimal reduction since their content is already optimized.
Does compressing a PDF affect text or vector content?+
No. PDF text and vector graphics are not affected by compression. Only embedded raster images are compressed to reduce file size. Text remains fully legible and selectable after compression.
Can I compress password-protected PDFs?+
Password-encrypted PDFs cannot be compressed without first removing the password. You'll need to unlock your PDF with the owner password before uploading. All compression runs locally in your browser — your PDF content is never sent to a server.