Make Your PDF Smaller — Choose the Quality Preset That Fits
Reduce PDF file size without visible quality loss
Shrink your PDF by re-rendering pages at a lower resolution. Choose a quality preset, compare the before/after file size, and download the smaller file. Runs entirely in your browser.
100 MB max per file
Drag & drop your files here
or browse from your device
PDF file · up to 100 MB each
Options
Higher quality keeps more detail but compresses less
100% FreeNo SignupFiles Never Leave Your Device
How to use this tool
Step 1: Upload your file
Drag & drop your file or click to browse. Files are processed locally in your browser and never uploaded.
Step 2: Adjust & process
Choose your settings and run the tool with one click.
Step 3: Download the result
Download your file instantly. Free forever, no signup, no watermark.
Why 123ToolKit?
| 123ToolKit | Typical online tools |
|---|---|
| Runs in your browser — files never uploaded | Uploads your files to cloud servers |
| Free forever | File size limits |
| No signup | Account required |
Compress PDF — FAQ
Upload your PDF and choose a quality preset (High, Medium or Low). Each page is re-rendered as an image at that preset's resolution, so text is no longer selectable — keep your original if you need to copy text. Higher presets keep more detail but shrink less.
Yes. The compressor is completely free with no signup and no watermarks.
It depends on the file. PDFs with large unoptimized images usually shrink the most. At any preset some detail is lost — High keeps the most, Low shrinks the most.
No. Compression happens in your browser, so your file never leaves your device.
Yes. Scanned PDFs compress too, though image-heavy scans may shrink less.
Yes, in one way: pages are rebuilt as images, so text is no longer selectable and fonts are baked into the page image. Layout and page order stay the same, but copy-paste and text search in the output will not work — keep the original for editing.
You can upload PDFs up to 100 MB per file, and compress as many files as you want.
Yes. Email providers often cap attachments around 20–25 MB, so compressing first helps your PDF fit.
Unlimited. There are no daily caps, no accounts and no queues.
No. The compressor runs entirely in your browser, on any device.
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