Heos Frame Inspector

Step through GIFs and video GIFs, restore upscaled pixel art to true size, clean palettes and export to Aseprite or GIF.

Heos Frame Inspector turns any GIF, animated WebP/PNG, sprite sheet or video GIF on the web into clean, editable pixel art. Right-click an image or video → "Inspect frames (Heos)", or click the toolbar button to list every image and video on the page. FREE • Step through every frame and see its exact duration • Auto-detects upscaled pixel art (even fractional scales like ×5.2) and restores its true size • Cleans compression noise back into the real palette, automatically • Merges repeated frames into the original timing • Video GIFs from social networks (MP4 / WebM), captured frame by frame • Onion skin, ping-pong, frame range and per-frame durations • Pixel grid, colour inspection, zoom without blur • Sprite sheet slicing and preview; no file exports or colour copying in Free • English and Spanish interface PRO — one-time payment, no subscription • Export PNG frames (.zip), sprite sheet + JSON and copy colours • Open in Aseprite: an .aseprite file with frames, durations and palette • Clean GIF export, pixel-perfect ×1 to ×8 • Palette export: .gpl, .pal, .hex (Lospec) and .png • Background removal with several colours PRIVACY Everything runs locally in your browser: no analytics, no tracking, no ads. The optional Pro purchase is handled by ExtensionPay and Stripe. Made by Heosphorus — pixel art tools for Aseprite: https://heosphorus.itch.io Please only use images you have the right to use, and credit the artists.