Long page support and image size limits
Short answer
Browsers cap a single image at 16,384 pixels on a side. Past that a capture must split into parts, and the only thing that matters is whether those parts tile the page exactly. Silent truncation — an image that looks complete but stops early — is the failure mode this feature exists to prevent.
Updated 13 August 2026Written by the Full Page Screenshot team
The limit is not arbitrary and it is not something a better tool can raise. It comes from the browser's graphics layer, applies to every extension equally, and is reached sooner on a high-density display because the image is captured at real pixel density.
Splitting behaviour
- Maximum edge length
- 16,384 px
- Maximum total area
- About 268 million px²
- Split point
- At the limit, on a band boundary
- Overlap between parts
- None
- Gap between parts
- None
- Untouched regions
- Still emitted, so parts always tile
Why memory is the real constraint
A 40,000 pixel image at 1,440 pixels wide is around 230 megabytes of raw bitmap. Holding that while also holding each incoming capture is how a tab runs out of memory and dies halfway through.
The engine encodes and releases each band as soon as nothing further will draw into it, so peak memory stays roughly flat regardless of page height. That is what makes a very tall capture finish rather than crash.
Frequently asked questions
How tall can a single screenshot be?
About 16,384 pixels. Beyond that the capture is delivered as multiple parts.
Do I lose content between the parts?
No. The last row of one part is immediately followed by the first row of the next.
Is there a way to get one file for a very tall page?
Yes — export to PDF. A PDF has no single-image size limit because the content is paginated.
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