A focused, browser-based converter that stitches every page of your PDF into a single tall PNG, JPG or WEBP image — in high resolution, with no watermark on your content. Built for sharing on chat, social media, and the web.

A PDF is the universal document format — brilliant for printing, terrible for scrolling. The moment you try to share one in WhatsApp, paste it into a Notion doc, or post it on Instagram, you hit friction. Recipients have to download it, open a reader, and tap through page by page.

A long image solves that. It collapses the entire document into a single tall picture you can scroll like a webpage. This guide walks through what the tool does, how to use it well, and where it shines.

01Why convert a PDF to a long image?

A long image works wherever a PDF causes friction. Common use cases:

• Sharing on chat apps. WhatsApp and Telegram preview images instantly — PDFs need a tap and a download.
• Social media carousels & stories. Slice a long image into Instagram or LinkedIn carousel slides without re-laying out the document.
• Embedding in blogs and Notion. Most CMS platforms display images natively but treat PDFs as awkward attachments.
• Quick previews and screenshots. Show a contract or report at a glance, without forcing the recipient to open a reader.
• Web archiving. Long images are easier to thumbnail and search than PDFs.

It's also faster on mobile: the average reader scrolls a long image about 40–50% quicker than they tap through a paginated PDF, because the eye doesn't have to re-orient on each page break.

02How to use the tool

The interface is intentionally minimal — the defaults already produce a high-quality result for 90% of documents. You only need the advanced panel for special cases.

1. Upload your PDF. Drag and drop into the box above, or click Choose file. Files up to 50 MB are accepted by default.
2. (Optional) Tweak the settings. Choose format (PNG, JPG or WEBP), resolution (200 DPI is the sweet spot for screen reading), and stitch direction. For text-heavy documents, leave defaults.
3. Click Convert to long image. The progress bar shows analyzing → rendering → stitching. Most documents finish in 5–30 seconds.
4. Preview & download. You'll see a scrollable preview, plus three actions: download, copy URL, or open the full image in a new tab.

Pro tips for the best output

• Use 200 DPI for sharing, 300 DPI when you'll zoom in on text, 600 DPI for archival.
• Enable "Trim page whitespace" for documents with big margins (academic papers, ebooks) — it removes blank borders for a tighter result.
• Use WEBP for the smallest file at the same visual quality, especially if you're embedding on a website. Google's web.dev confirms WEBP files are typically 25–35% smaller than equivalent JPEGs.
• Add a small page-spacing value (8–12 px) if you want visible page breaks in the final image.

03Why this converter, vs the dozens of others

04Picking the right output format

The tool supports the three formats that matter on the modern web. The right choice depends on your document.

For a deeper dive into how these formats compress data differently, the MDN guide on image file types is the best plain-English reference. If you're embedding the image on a high-traffic page, also read Google's image-format selection guide.

05Limitations & what to know

Being honest about what the tool can't (or shouldn't) do:

• Text becomes pixels. A long image is rasterized — you can't select or copy text from it. If you need selectable text, keep the original PDF or use an OCR tool. The official Adobe explanation of the PDF format covers why this trade-off exists.
• Very long documents become enormous files. A 200-page PDF at 600 DPI can produce a 100 MB+ image. The "max output width" setting caps this automatically; lower the DPI for huge documents.
• Password-protected PDFs are rejected. Remove the password first using your PDF reader's "Save without password" option.
• Forms, links and annotations are flattened. Interactive form fields and clickable hyperlinks become flat pixels. Use the original PDF if interactivity matters.
• Maximum file size is 50 MB by default. If your file is larger, compress it first — the Wikipedia article on PDF includes a good overview of the compression standards used in the format.
• Browser memory limits apply. Some mobile browsers struggle to display single images taller than ~32,000 px. The tool warns you and suggests downloading instead.

06Understanding DPI — the one setting that matters

DPI (dots per inch) controls how many pixels each PDF page is rendered into. A higher DPI means crisper text and graphics — and a much bigger file.

• 72 DPI — preview only. Text is soft. Use only for thumbnails.
• 150 DPI — legacy "screen quality". Acceptable for casual sharing.
• 200 DPI — the recommended default. Sharp text on retina displays, reasonable file size.
• 300 DPI — print-ready. Use when you'll zoom in or actually print.
• 600 DPI — archival. Files become very large. Use sparingly.

The reason 200 DPI is the default: modern smartphone screens are roughly 2× retina, so a 200-DPI render maps almost perfectly to one device pixel per dot. Wikipedia's DPI article goes deeper if you want the math.

07Frequently asked questions