Free Online Sprite Sheet Analyzer — Detect, Play & Extract Frames

Sprite Analyzer is easier on a bigger screen

It runs on your phone — everything happens on your own device — but inspecting a grid of tiny frames is far more comfortable on a laptop or desktop.

Generate a 3D model — works on your phone Browse the marketplace Plans & credits Community gallery All workspaces

BitSoul3D Sprite AnalyzerLive · your hardware

— credits Workspaces

Sprite sheet

Drop a sheet PNG. Nothing is uploaded — the grid detection, playback and export all run on this device.

Drop a sprite sheetor tap to choose — PNG with transparent gutters works best

sheet.png—

Frame grid0 frames

Auto-detectScans transparent gutters ManualColumns × rows, cell size

Projects the alpha channel onto each axis and splits the sheet wherever a whole column or row is empty. When the frames sit on a regular pitch the grid is snapped to exact cells.

Alpha threshold 0–255

Min gutter px

Treat the corner colour as background for opaque sheets

Colour tolerance 24

Use tight bands instead of uniform cells irregular sheets

Load a sheet, then press Detect grid.

Columns

Rows

Cell width px

Cell height px

Margin X px

Margin Y px

Spacing X px

Spacing Y px

Cells are laid out left-to-right, top-to-bottom.

Trim transparent edges per frame export Skip empty cells

Playback

Play

Direction

Onion skin Player view

Ghost frames 1–4

Show

Ghost opacity 35%

Tint ghosts red before, blue after

Frame anchor Player view

Frame tags0

Name a range of frames (walk, idle, attack…). Shift-click frames in the strip to select a range, then add a tag. Tags are written into the exported JSON.

Name

From

Loop

No tags yet.

ExportFree

File name prefix

Frame JSON layout

Include the original sheet in the zip

Re-pack padding px

Send to

What

100%

Grid Checkerboard Numbers

—

Drop a sprite sheet here
or choose one in the panel — PNG, WebP, GIF or JPEG

Working…

— / — FPS

Frames

Frames appear here once a grid is set.

Keyboard shortcuts

Work the stage without reaching for the mouse.

SpacePlay / pause ← / →Previous / next frame Home / EndFirst / last frame Shift + ← / →Extend the selection + / −Zoom in / out 0Fit the sheet to the stage GToggle the grid overlay OToggle onion skin VSwitch Sheet / Player view TTag the selected frames ?This legend