How is this different from other online PDF tools?

Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.

Are my PDF files uploaded?

No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.

Can I verify that files are not uploaded?

Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.

Does this tool work offline?

Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.

What happens when I refresh the page?

Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.

Does this tool store my files?

No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.

Can this tool unlock password-protected PDFs?

No. This tool does not attempt to remove or bypass PDF password protection. If you know the password, the Unlock PDF tool on this site can remove it locally; then this tool can process the file.

What technologies does this tool use?

This tool uses pdf.js (Mozilla's client-side PDF engine) to render each page in a Web Worker and the Canvas API to stitch them into one image — all within your browser.

Does this tool use WebAssembly?

No. pdf.js is a plain JavaScript library — it does not use WebAssembly. All rendering and stitching happens in client-side JavaScript within your browser.

How do I turn my PDF into one long image?

Pick a PDF from your device with the file picker, choose PNG or JPG as the output format, then select Create. The tool renders every page in your browser and offers a single tall image to save back to your device.

Why does a long document come out looking blurry or less detailed?

Browsers cap how large a single canvas can be (around 16000 pixels here), so when stacking all pages would exceed that, the tool automatically scales everything down to fit, which softens detail. For a very long PDF, splitting it into smaller files first or using the PDF to Images tool to keep pages separate preserves more sharpness.

Should I choose PNG or JPG for the stitched image?

PNG keeps text and lines crisp with no compression artifacts but produces a larger file, while JPG is much smaller and better for image-heavy pages at the cost of some sharpness around edges and text. Either way, pages narrower than the widest page are centered on a white background so the stitched image stays evenly aligned.

Does the PDF to Long Image tool cost anything to use?

PDF to Long Image is completely free — no account, no sign-up, and no cap on how many PDFs you stitch into a single tall image. It always will be free. Every page is rendered and combined locally inside your browser using the Canvas API, so your file stays on your device from start to finish and is never sent anywhere.

Convert a PDF to One Long Image Privately — Stitch Pages in Your Browser

Select a PDF and download a single tall image with all pages stacked vertically — rendered locally in your browser with no upload.

Quick answer

What it does: Select a PDF and download a single tall image with all pages stacked vertically — rendered locally in your browser with no upload.
Free?: Yes — 100% free, no account or sign-up.
Files uploaded?: No — everything is processed in your browser.
Works offline?: Yes — once the page has loaded.
Best for: A developer shares a multi-page PDF receipt on a chat platform as a scrollable image instead of attaching a PDF file.
Good to know: Browsers limit how large a single image can be; very long documents are scaled down to fit, reducing detail.

How it works

Select a PDF file from your device using the file picker.
The file is read into browser memory — no data leaves your browser.
pdf.js renders each page to a canvas in a Web Worker.
Every page is drawn stacked vertically onto one tall canvas, which is exported as a PNG or JPG.
The combined image is offered as a download directly from your browser.

When to use this tool

A developer shares a multi-page PDF receipt on a chat platform as a scrollable image instead of attaching a PDF file.
A designer sends a client a single tall image of a multi-page brochure proof for quick review without needing a PDF viewer.
A social media manager converts a short product guide PDF to one tall image for use in an Instagram swipe carousel.
Very long documents are scaled down to fit browser image size limits, reducing detail; the output text is also not selectable.

Frequently asked questions

How is this different from other online PDF tools?: Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.
Are my PDF files uploaded?: No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.
Can I verify that files are not uploaded?: Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.
Does this tool work offline?: Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.
What happens when I refresh the page?: Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.
Does this tool store my files?: No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.
Can this tool unlock password-protected PDFs?: No. This tool does not attempt to remove or bypass PDF password protection. If you know the password, the Unlock PDF tool on this site can remove it locally; then this tool can process the file.
What technologies does this tool use?: This tool uses pdf.js (Mozilla's client-side PDF engine) to render each page in a Web Worker and the Canvas API to stitch them into one image — all within your browser.
Does this tool use WebAssembly?: No. pdf.js is a plain JavaScript library — it does not use WebAssembly. All rendering and stitching happens in client-side JavaScript within your browser.
How do I turn my PDF into one long image?: Pick a PDF from your device with the file picker, choose PNG or JPG as the output format, then select Create. The tool renders every page in your browser and offers a single tall image to save back to your device.
Why does a long document come out looking blurry or less detailed?: Browsers cap how large a single canvas can be (around 16000 pixels here), so when stacking all pages would exceed that, the tool automatically scales everything down to fit, which softens detail. For a very long PDF, splitting it into smaller files first or using the PDF to Images tool to keep pages separate preserves more sharpness.
Should I choose PNG or JPG for the stitched image?: PNG keeps text and lines crisp with no compression artifacts but produces a larger file, while JPG is much smaller and better for image-heavy pages at the cost of some sharpness around edges and text. Either way, pages narrower than the widest page are centered on a white background so the stitched image stays evenly aligned.
Does the PDF to Long Image tool cost anything to use?: PDF to Long Image is completely free — no account, no sign-up, and no cap on how many PDFs you stitch into a single tall image. It always will be free. Every page is rendered and combined locally inside your browser using the Canvas API, so your file stays on your device from start to finish and is never sent anywhere.