Screenshot Stitcher

Taking screenshots

• Scroll through the list and take a screenshot each time, overlapping the previous one by at least two rows.
• Take them all the same way: same device, same window size, and no cropping.
• Keep notifications, the taskbar and anything outside the game window out of the shot.
• Most scrolling screens work, such as the Skills, Inspiration and Career Info tabs, race results, entry lists and support card lists.

Stitching and saving

• Screenshots are matched by where they overlap, so their order usually doesn't matter. If some can't be matched, they're stacked in the numbered order. Use ‹ › (or drag on desktop) to change it.
• You can add screenshots of several characters at once. Each one gets its own column.
• On iPhone or iPad, long-press the result to save it to Photos.

Skill icons (beta)

• Adds the matching skill icon next to each skill spark.
• Sparks without a skill icon, such as race and scenario sparks, get a [?]. So do names that can't be read.
• Screenshots at least 1500px tall give the best results.
• Skill data from U-tools.

Ver1.0: Initial release
Ver1.01: Fixed adjacent-image detection logic
Ver1.02: Added output display size toggle; fixed behavior when multiple close buttons are detected
Ver1.1: Added support for loading from clipboard and copying result to clipboard
Ver1.11: Improved behavior when loading many or high-resolution images
Ver1.12: Fixed so stitching works even when content below the close button isn't visible
Ver1.13: Fixed the result background color not being set
Ver1.2: Added processing progress indicator
Ver1.3: Added header display option; hides scrollbar
Ver1.4: Added support for some non-standard layouts (e.g. other users' Uma Musume)
Ver1.41: Added support for the wide-format images from the Google Play Games version
Ver1.42: Fixed distorted output when loading images of different layouts together
Ver1.43: Tweaked stitching to reduce visible seams
Ver1.44: Provisional support for slightly darker screenshots
Ver1.45: When some images can't be positioned, they're now appended to the end
Ver1.5: Reduced misalignment during stitching
Ver1.51: Tweaked detection so faint close-button outlines are still recognized
Ver1.6: Added Ctrl+V to paste from 📋
Ver1.61: Made close-button detection more robust
Ver1.62: Internal logic tweaks for upcoming features; adjusted adjacency thresholds
Ver2.0: Added skill icon display feature (β). Thanks to U-tools!
Ver2.01: Fine-tuned close-button detection threshold
Ver2.02: Fixed missing icon for Lucky Seven factor
Ver2.1: Added support for finish-order table, Champions Meet score info, and entry list screens
Ver2.11: Added support for race detail screen
Ver3.0: Added support for most scrollable screens
Ver3.1: Added horizontal layout for Champions Meet bulletins
Ver3.11: Improved stitching for screens with bottom-pinned buttons (e.g. Uma Musume list)
Ver3.12: Same Uma Musume on different tabs now placed side-by-side
Ver3.2: For certain layouts, ordering is now determined from the scrollbar position
Ver3.21: Disabled scrollbar-based ordering when scrollbar lengths differ; fixed inconsistent results based on load order; misc fixes
Ver3.22: Updated factor-name position detection
Ver3.23: Skip skill-icon processing on non-factor screens
Ver3.24: Stopped adding ? to blue/red/green factors
Ver3.25: Now errors out before running if findLastIndex isn't available
Ver3.26: Added favicon
Ver3.31: Provisional Steam version support
Ver3.32: Fixed cases where left/right were trimmed too aggressively
Ver3.33: Fixed cases where generic stitching didn't work well
Ver4.01: Translated the site to English
Ver4.02: Fixed the "your browser is too old" warning so it actually shows up when it should
Ver4.03: Internal code cleanup — no change to how the site behaves
Ver4.04: Removed an accidental duplicate setting
Ver4.05: The "stitched by scrollbar position" notice no longer flashes multiple times in a row
Ver4.06: Reduced memory used while figuring out the scroll area
Ver4.07: Reduced memory used while handling unfamiliar screen layouts
Ver4.08: Reduced memory used while resizing and joining images
Ver4.09: Reduced memory used while picking out colored pixels
Ver4.10: Reduced memory used while identifying which screen each screenshot is from
Ver4.11: Reduced memory used while slicing each screenshot into parts
Ver4.12: Fixed a potential crash from cleaning up the same memory twice
Ver4.13: Fixed broken skill-icon detection caused by a memory bug
Ver4.14: Stitching is much faster on large screenshots — replaced slow pixel-by-pixel scanning with bulk reads
Ver4.15: Repeat runs are faster — reference images are now loaded once per visit instead of once per screenshot
Ver4.16: Skill-icon detection is faster — the factor template no longer reloads on every factor
Ver4.17: Grouping screenshots by character is faster — comparison data is reused across pairs
Ver4.18: Skill-icon mode starts almost instantly on later runs instead of reloading the Japanese OCR model every time
Ver4.19: Status messages no longer vanish early when a new one appears right after
Ver4.20: The loading spinner no longer gets stuck if an image fails to load
Ver4.21: Fixed a potential crash when stitching certain layouts that don't have a header
Ver4.22: If stitching fails partway through, the next attempt is no longer affected by leftover state
Ver4.23: Removed an unused setting that was disabled anyway
Ver4.24: Removed about 200 lines of dead code
Ver4.25: Layout matching with masks is faster — fewer redundant color conversions per comparison
Ver4.26: Reset no longer reloads the page — keeps OpenCV, the Japanese OCR model, and templates in memory so the next Generate is fast
Ver4.27: PC/Steam screenshots stitch better — tighter crop, more reliable overlap detection
Ver4.28: Stopped misaligning screenshots that only share a section header but no actual content
Ver4.29: Unmatched screenshots now keep your load order instead of always going to the bottom
Ver4.30: Tighter check on PC/Steam matches to avoid wrong alignments from list rows that look similar but aren't
Ver4.31: No more duplicate rows at the seam between two screenshots
Ver4.32: Drag preview thumbnails to reorder them, or click one to see it full-size
Ver4.33: Fixed PC/Steam overlap detection
Ver4.34: Skill icons now work with the English version of the game — skill names are read in English, small misreads still find the right icon, and missing skill icons were added
Ver4.35: The page loads a little faster, and screen readers now announce status and error messages
Ver4.36: Redesigned page - numbered previews you can reorder on any device, Stitch and Save buttons that stay in reach on phones, working tap-to-zoom, clearer text and error messages, and the save buttons no longer appear before there's a result