Drop your PDF
One file or several. Password-protected PDFs need unlocking first.
Compress PDF to 500 KB
Get a PDF under 500 KB without guessing: the limit is already set, so you just drop the file. Images are shrunk first and the text stays sharp when possible. Nothing is uploaded.
- Free
- No sign-up
- Runs in your browser
Common limits
First the images inside are shrunk and the text is kept. Only if that is not enough are pages turned into images.
100% private — your PDFs are processed on your device and are never uploaded to any server.
Works with PDFs up to about 300 MB each. Password-protected PDFs cannot be processed.
Next step
Keep going with your result in another tool. Nothing is uploaded.
How it works
The limit is already set
The maximum size is 500 KB; you can change it or keep the pages readable.
Download the smaller PDF
The PDF is reduced on your device and you download it at 500 KB or less.
How to compress a PDF to 500 KB
To compress a PDF to 500 KB, drop it on the box above: the limit is already set to 500 KB. The tool shrinks the images inside the PDF first and keeps the text selectable; only if that is not enough does it convert pages to images. Everything happens in your browser, so the PDF is never uploaded.
What 500 KB holds in a PDF
500 KB is 500,000 bytes. As a rough guide, that is about five scanned pages at a reading-quality resolution, though a PDF made from text (not scans) takes far less room per page and a PDF full of photos takes more.
Where a 500 KB PDF limit is common
A limit of about 500 KB is typical for email attachments, online applications and portals with small limits. Uploads over the limit are rejected outright, so the aim is to land at or under the number, not to shrink as far as possible.
How the PDF gets under 500 KB
Most of a PDF's weight is usually its images, especially scans and photos. The tool recompresses those images at a lower quality and resolution, keeps the text as real, selectable text, and checks the result against your limit. If the document still does not fit and you allow it, it turns pages into images as a last resort, which always fits but makes text no longer selectable.
How many pages fit in 500 KB (estimate)
| Scan setup (A4 page) | Approx. weight per page | Pages that fit |
|---|---|---|
| 150 DPI, grayscale | 70 KB | 7 |
| 150 DPI, color | 150 KB | 3 |
| 200 DPI, grayscale | 120 KB | 4 |
| 300 DPI, grayscale | 250 KB | 2 |
| 300 DPI, color | 600 KB | less than one |
How much has to go
| Typical document | Reduction needed |
|---|---|
| 10-page scan, 150 DPI grayscale (about 700 KB) | 29% |
| 10-page scan, 150 DPI colour (about 1.5 MB) | 67% |
| 10-page scan, 300 DPI colour (about 6 MB) | 92% |
| Phone-photographed 5-page document (about 15 MB) | 97% |
When you need a 500 KB PDF
A 500 KB PDF limit is common for email attachments, online applications and portals with small limits. It allows around five scanned pages at reading quality, so it suits short documents such as a CV with a cover letter or a two-page form.
What to give up first at 500 KB
At 500 KB you can keep readable, mostly untouched pages. The tool usually only needs to recompress the images: a colour scan at 150 DPI is often reduced to a fraction of its weight without visible loss on screen, while photographs inside the page take the biggest cut.
Tips to fit under 500 KB
- Merge your pages into one PDF first, then compress the result once instead of shrinking each page separately.
- Prefer 150 DPI to 200 DPI scans: sharper than needed, and heavier for no reader benefit.
- If a scanned page has a large grey or dark margin, crop it first; it costs bytes without adding information.
- Keep the option to convert pages to images off if the text must stay selectable or searchable.
Private by design
The PDF is processed in your browser. Contracts, IDs, invoices and medical documents are never uploaded to a server, which is why there is no queue and no file size imposed by an upload.
Frequently asked questions
How do I compress a PDF to 500 KB?
Drop the PDF on the tool at the top of this page. The limit is already set to 500 KB; the tool reduces the file until it fits and lets you download it.
How many scanned pages fit in 500 KB?
About five pages at 150 DPI in colour, or around seven in grayscale.
Can I email a PDF of 500 KB anywhere?
Yes. It is far below every email attachment limit, so it is also a courteous size to send to people on mobile connections.
Will my PDF be exactly 500 KB?
It will be 500 KB or less. The tool stops as soon as the file fits, so the result is often just under the limit rather than exactly on it.
Will the text stay selectable?
Yes when the images alone can be shrunk enough. If that is not enough and you allow converting pages to images, those pages lose selectable text; you can switch that option off.
Why won't my PDF get under 500 KB?
PDFs with many high-resolution photos, or many pages, may need a stronger reduction. Try removing pages, splitting the file or allowing the last-resort option.
Is it free and private?
Yes. No sign-up, no watermark, and the PDF never leaves your device because it is processed in your browser.
Related tools
More utilities that also run without leaving your browser.
Reorder PDF pagesChange the order of a PDF's pages, then download the result.
Rotate a PDFFix sideways or upside-down pages, one at a time or all together.
Sign a PDFPlace a signature image anywhere on any page of a PDF and download the signed file.
Compress PDFShrink PDF files by recompressing their images, keeping the text selectable.
Convert PDF to PDF/AProduce PDF/A-2B or PDF/A-1B files for archiving and official procedures, privately.
Merge PDF filesCombine several PDFs into one, in the order you choose, without uploading them.