Seamless Pattern Maker
A tile repeats seamlessly when its left edge matches its right edge and its top matches its bottom. Mirroring guarantees that: the image is reflected into a 2×2 block, so every edge meets its own reflection. The tile can then repeat as a website background, a 3D texture or a print pattern with no visible join, at the cost of a symmetrical, kaleidoscope-like look.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
JPG, PNG, WebP, HEIC, AVIF, GIF, TIFF, SVG, RAW, PSD, JXL, BMP, ICO and more
How to use Seamless Pattern
- 1
Drop your images, choose files, or paste from the clipboard.
- 2
Adjust the options. The preview updates as you change them.
- 3
Click Tile. Files are processed on your device.
- 4
Download each result or everything as a ZIP.
Why use Aback Images for seamless pattern
Any grid
From 1×2 strips to 12×12 grids, with an optional gap in any colour or transparent.
Mirror for seamless edges
Mirroring alternate tiles makes every edge meet its own reflection, so the result repeats without seams.
Size under control
Shrink each tile first so large grids stay within your device's memory and a sensible file size.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
Related tools
Repeat an image in rows and columns, with optional gaps and mirrored tiles, for patterns, wallpapers, print sheets and textures.
Reflect one half of an image onto the other for symmetric, kaleidoscope-like results.
Generate data URIs ready for CSS and HTML embedding, optionally optimised first.
Pack images into a sprite sheet with CSS classes and JSON coordinates.
Every favicon and touch icon size, a multi-size favicon.ico, web manifest and HTML snippet in one ZIP.
Generate iOS, Android adaptive, macOS and PWA icon sets from one square image.
QR codes for links, Wi-Fi, contacts and text with colours, logo and PNG/SVG export.
Read QR codes from screenshots and photos without a phone.
Frequently asked questions
Why does the pattern look symmetrical?
Mirroring is what removes the seams, and it makes the pattern symmetric along both axes. On textures without obvious features (grass, stone, fabric) the symmetry is barely noticeable; on faces and text it is obvious.
How do I use it as a CSS background?
Save the tile and set it as background-image with background-repeat: repeat. Because the tile is seamless, the repeat is invisible. Shrink the tile under More options to keep the file small.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.