Developer docs: Overview
Get started
PDFkind for websites
Add free PDF tools to your website, or shrink oversized uploads in the browser before your form sends them. One line of code, no account, no ads, and files never leave the visitor’s device.
Two free building blocks for any website. They share one small script, need no account or key, show no ads, and process files in your visitor’s browser: nothing is uploaded to PDFkind.
For upload forms
Upload helper
Visitors pick a 12 MB scan, your form needs 5 MB. The file is reduced on their device and your form receives one that fits. No change to your upload code.
<script src="https://pdfkind.com/embed.js" defer></script>
<input type="file" data-pdfkind-max="5MB">For help pages and portals
Full tools
Put a PDF merger, compressor, editor or any of the 128 tools on your page, in 16 languages, without PDFkind’s menus or ads.
<script src="https://pdfkind.com/embed.js" defer></script>
<div data-pdfkind-tool="merge-pdf"></div>Why sites use it
| Benefit | What it means |
|---|---|
| Fewer failed uploads | Applicants, patients and customers stop getting stuck on “file too big”, the most common upload error. |
| Private by design | Files are processed on the visitor’s device. They reach your server only through your own form, as before. |
| Nothing to maintain | No server, no API key, no quota. If PDFkind is unreachable, your form works exactly as it did without it. |
| Free | We only ask you to keep a small link to PDFkind next to the field or tool. |
Where to go next
Last updated November 3, 2026 · Questions: contact@pdfkind.com