When this tool is useful
Long screenshot sections, before-and-after strips, comic panels, scanned fragments, receipts, or simple image sequences that benefit from consistent cell dimensions and one chosen background.
How local processing works
The browser decodes each image, allocates one bounded RGBA canvas made from the selected cell width, cell height, gap, and outer padding, then places the sources in order. Contain scales each whole image to fit and can expose the chosen background; cover scales to fill and crops edges. The composite is encoded as PNG.
How to use it
- Prepare Stitch images: Work from a copy and confirm source order, horizontal or vertical direction, cell width and height, contain or cover fit, gap, outer padding, transparent or solid background, calculated output dimensions, total pixels, memory, and PNG byte size. Keep every source unchanged.
- Run Stitch images: Process only in this browser. The browser decodes each image, allocates one bounded RGBA canvas made from the selected cell width, cell height, gap, and outer padding, then places the sources in order. Contain scales each whole image to fit and can expose the chosen background; cover scales to fill and crops edges. The composite is encoded as PNG.
- Download and verify: Save under a new name. Confirm source order and calculated output dimensions, inspect contain background areas or cover-cropped edges in every cell, check gaps, padding, seams, transparency, and colors at 100%, and retain originals because the flattened PNG cannot be separated losslessly into its source files.
Important limitations
All inputs become one raster layer. Animation, vectors, editable layers, source metadata, color-profile intent, original containers, and independent files are not preserved; browser decoding can affect color, and a very long canvas is rejected before allocation.
Verify the downloaded result
Confirm source order and calculated output dimensions, inspect contain background areas or cover-cropped edges in every cell, check gaps, padding, seams, transparency, and colors at 100%, and retain originals because the flattened PNG cannot be separated losslessly into its source files.
Private by design
Your files stay in this browser. The tool does not upload the source or output to our servers.
Questions and answers
When is Stitch images useful?
Long screenshot sections, before-and-after strips, comic panels, scanned fragments, receipts, or simple image sequences that benefit from consistent cell dimensions and one chosen background.
How does Stitch images work?
The browser decodes each image, allocates one bounded RGBA canvas made from the selected cell width, cell height, gap, and outer padding, then places the sources in order. Contain scales each whole image to fit and can expose the chosen background; cover scales to fill and crops edges. The composite is encoded as PNG.
Which limits require attention?
source order, horizontal or vertical direction, cell width and height, contain or cover fit, gap, outer padding, transparent or solid background, calculated output dimensions, total pixels, memory, and PNG byte size. All inputs become one raster layer. Animation, vectors, editable layers, source metadata, color-profile intent, original containers, and independent files are not preserved; browser decoding can affect color, and a very long canvas is rejected before allocation.
How should I verify the result?
Confirm source order and calculated output dimensions, inspect contain background areas or cover-cropped edges in every cell, check gaps, padding, seams, transparency, and colors at 100%, and retain originals because the flattened PNG cannot be separated losslessly into its source files.