ConvertorLab
Preset: 300KBNo uploadBatch + ZIP

Compress PDF to 300KB

Get your PDF under 300KB in one step. The target size is already set: add the file, press Start Compression, and download a PDF that fits the upload limit. Free, no sign-up, and the file stays on your device.

Import and settings

Add PDF files, choose how strongly to reduce page images, then compress the batch.

Drag & drop PDF files here or

Supported: PDF. Limits: 200 files - 1 GB total.

70%

With a target size set, quality and DPI are chosen for you. Works best on scanned or image-heavy PDFs. If compression would make a small or already optimized PDF larger, ConvertorLab keeps the original file instead of forcing a bigger download.

Compression complete. Download individual files or save the full ZIP.

Files and downloads

The ZIP download unlocks after compression finishes.

No PDF files selected yet. Add PDFs from the import panel. Large batches will scroll here without stretching the page.

Compress a PDF to under 300KB

This page is set up for one job: getting a PDF under 300KB. The target size is already selected, so you only need to add the file and press Start Compression. The compressor tries the sharpest version first and steps quality and resolution down until the file fits, then shows you the final size before you download.

A 300KB limit is common for multi-page applications, experience letters, statements and bundled documents. As a rough guide, 300KB holds about five to eight scanned pages, or a longer typed document.

How to reduce PDF size to 300KB

  1. Add the PDF. The target is already set to 300KB.
  2. Optional: choose Grayscale if the document is black and white.
  3. Press Start Compression and wait for the file to show its new size.
  4. Check and download. Drag the preview slider to make sure the text is readable.

Tips for a sharp PDF at 300KB

For a bundle of separate scans, merge them first with Merge PDF, then compress the merged file once. One pass gives a more even quality than compressing each part.

If the tool reports that 300KB can't be reached, the document has too many pages for that size. Remove pages you don't need with Split PDF, or ask whether the portal accepts a larger file. Remember that compression flattens the PDF into images, so keep the original for anything that needs selectable text or a digital signature.

Free, and your PDF isn't uploaded

Compression runs in your browser on your own device, so the document never reaches our server. There's no sign-up and no watermark, and it works on phones as well as computers.

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Compress PDF to 300KB questions

Can I compress several PDFs to 300KB each?

Yes. Add all the files at once. Each one is compressed separately to fit under 300KB, and you can download them individually or as a ZIP.

Is this 300KB PDF compressor free?

Yes. There's no sign-up, no watermark and no daily limit.

What if my PDF is already smaller than 300KB?

It's left unchanged, so you never download a lower-quality copy for no reason.

Can I choose a different size?

Yes. Change the Target size menu to any other value, or pick Custom and type your own limit in KB.

Is my PDF uploaded anywhere?

No. Everything happens in your browser.