Is my HTML or URL uploaded to a server?

No. The conversion runs entirely in your browser using DOMPurify, html2canvas, and jsPDF. For URL mode, your browser fetches the page directly using the standard fetch() API — there is no server proxy. You can verify in the Network tab that the only outbound request is to the URL you provided.

Why does my URL fetch fail?

Many websites block cross-origin requests via CORS headers — a browser security policy that prevents scripts on one domain from loading content from another without explicit permission. If a URL fetch fails, the site is almost certainly serving a missing or restrictive Access-Control-Allow-Origin header. The workaround is simple: open the page in a browser tab, view-source or save the HTML to a file, then upload the file. Same-origin URLs (your own site) and pages that explicitly allow cross-origin requests will fetch successfully.

Are JavaScript-driven sites supported?

Partially. The tool fetches and renders the static HTML returned by the server. Single-page apps (React, Vue, Angular) that render content client-side after the page loads will appear empty or unstyled because their content has not run yet at fetch time. To capture a JS-rendered page, open it in your browser, wait for it to fully load, save the rendered HTML via View Source or DOM export, then upload that file. ToolMint cannot execute the page's JavaScript inside an isolated converter for security reasons.

How are images and fonts handled?

Images referenced by absolute URLs are loaded by html2canvas during rasterisation, subject to CORS — same restriction as the URL fetch above. Cross-origin images that block CORS appear blank in the output. Custom web fonts loaded via @font-face or Google Fonts are captured if they have already loaded in your browser when conversion runs. To guarantee a specific look, inline base64 images and stick to common system fonts (Arial, Times New Roman, Courier).

Will my CSS @page rules be honoured?

Native CSS @page rules (page-break-before, page-break-after, @page size) are not interpreted because html2canvas snapshots the page as a single image and jsPDF then slices it across pages by pixel height. Use the page size, orientation, and margin controls in this tool instead. For complex paginated layouts (book chapters, invoices with footers per page) a dedicated print-stylesheet workflow in your browser's native Print dialog gives better fidelity.

What is the file size limit?

HTML uploads are capped at 20 MB which is more than enough for any realistic single-page document. For pasted HTML and URL fetches there is no hard cap, but the practical ceiling is browser memory during the html2canvas raster step — pages with thousands of high-resolution images may exhaust memory on lower-spec devices. If conversion fails, simplify the page or split it into sections before converting.

HTML to PDF

Convert HTML pages to PDF documents

Processed locally — your files never leave your browser

How It Works

Provide HTML

Choose one of three input modes: upload an .html file, paste raw HTML directly into the textarea, or fetch a public URL. In every mode the HTML stays on your device — for the URL mode, your browser fetches the page directly, no server proxy is involved.

Convert

The HTML is sanitised with DOMPurify (to strip scripts and event handlers), rendered to a high-resolution off-screen canvas via html2canvas, then drawn page-by-page into a PDF using jsPDF inside a Web Worker. This pipeline runs entirely client-side so no upload is ever made.

Download

Save the generated PDF to your device. Pick page size (A4, Letter, Legal), orientation, and margin before converting. Output is a standard PDF compatible with every modern reader and ready for printing, archiving, or sharing.

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