EsyTool

Compress PDF Online

Reduce PDF file size by re-rendering pages at lower image quality. All processing happens locally.

Runs entirely in your browser

Drop a PDF here or click to browse

Choose file
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Specialized use cases

Compress PDF for EmailShrink your PDF files to under email attachment limits quickly and locally in your browser.Compress PDF to 100KB Online - Free Local ShrinkerCompress heavy PDF documents down to 100KB or less for portal uploads, university applications, and official government forms.Compress PDF to 200KB - Fast Local PDF ReducerShrink PDF document size to 200KB or less locally in your browser. Ideal for job applications and portal submissions.Compress PDF to 500KB - Free PDF OptimizerReduce PDF file size to 500KB without compromising document clarity or layout.Compress PDF to 1MB - High Quality Document ShrinkerShrink heavy PDF files from 15MB+ down to 1MB for fast web viewing and email distribution.
How to use Compress PDF
  1. 1Click 'Select PDF File' or drag and drop your PDF into the upload area.
  2. 2Choose a compression level: Low keeps quality high, High shrinks the file as much as possible.
  3. 3Click 'Compress & Download' — the smaller PDF saves directly to your device.
Privacy & security

Your PDF is compressed entirely within your browser. Pages are re-rendered at a lower image quality using HTML5 Canvas — no file is uploaded to any server, and nothing is stored after you close the tab.

Compression happens inside your browser's sandboxed JavaScript environment. No file content or metadata is ever transmitted over a network connection.

Frequently asked questions
How does PDF compression work here?

Each page is re-rendered onto an HTML5 Canvas and saved as a JPEG image at a lower quality. This significantly reduces file size but converts text layers to images, so text won't be selectable in the compressed file.

How much smaller will my PDF get?

Results vary by content. PDFs full of high-resolution photos can shrink by 60–80% on High compression. PDFs with mostly text or already-compressed images may see less reduction.

Will the compressed PDF look different?

At Low compression the difference is barely noticeable. At High compression, fine detail and sharp edges may appear slightly blurry, especially at high zoom levels.

Can I compress a password-protected PDF?

No — password-protected PDFs cannot be read or processed by this tool. Remove the password first, then compress.

Is there a file size limit?

There's no server-side limit since everything runs locally. Very large PDFs (100+ MB) may be slow depending on your device speed and available memory.