Convert ReSprite to Aseprite in your browser

Convert a supported ReSprite project to Aseprite when you have an original .resprite project and want a new editable .aseprite file without sending the artwork to a conversion server. The browser reads the bundle, validates its project metadata, decodes supported cel PNGs, maps the result into SpriteProject, and prepares the Aseprite download locally.

Start with the simplest official path: ReSprite itself documents Aseprite as an export format. If ReSprite is installed and opens the project correctly, its native Menu > Export > Aseprite workflow is the first option to try. This site is a browser-local alternative for the deliberately bounded subset described below.

How to convert ReSprite to Aseprite

1. Keep the original .resprite project unchanged and work from a copy.
2. Open the Sprite Converter and select ReSprite as the source and Aseprite as the destination on the format surface.
3. Add exactly one genuine .resprite file. Do not rename an unrelated ZIP archive or flat image.
4. Start the conversion and wait while the browser validates the archive, project document, raster layers, frames, and cel images.
5. Review the local preview, frame count, timing, layer names, visibility, opacity, and cel placement.
6. Download the generated .aseprite file and open it in Aseprite before replacing any part of an art pipeline.

Selected project bytes stay in the browser tab throughout parsing, image decoding, conversion, preview, and download. The static site has no artwork-upload endpoint or remote conversion fallback. Ordinary page assets are still served by the host, as explained in the browser-local processing article.

What the supported importer preserves

A genuine ReSprite file is a project bundle containing a project document, metadata, and cel image data. The importer checks the ZIP directory and entry checksums, finds one .resprite/document.json root, compares the canvas and frame counts in document.json and meta.json, and then reads only the entries required by the supported model.

Layers are preserved only because the supported ReSprite source contains explicit layer and cel records. This is different from converting a flattened PNG, which cannot reveal the original layer boundaries. The converter does not claim to recover missing layers or to provide a lossless round trip for every editor feature.

Features intentionally outside this subset

The current SpriteProject model and Aseprite writer represent normal RGBA raster layers, positioned cels, frame durations, and supported tags. ReSprite layer groups, clipping masks, non-normal blend modes, per-cel opacity, palettes, tilemaps, reference images, Deco modules, and editor-only metadata do not have a verified mapping in this path. The importer rejects unsupported structural features instead of silently flattening or discarding them while reporting success.

ReSprite's own documentation also notes that not every editor feature maps identically when exporting to other project formats. Consult the official format compatibility notes when a project uses clipping, palette, grid, or blend behavior that matters. Native export may cover more than this site's conservative browser importer, but the generated file should still be inspected in Aseprite.

Why a ReSprite file may be rejected

The file is not a valid project bundle

The importer requires one safe ZIP root ending in .resprite, valid central-directory metadata and checksums, plus matching document.json and meta.json. Truncated archives, unsafe paths, encrypted entries, ZIP64 structures, missing cel PNGs, or inconsistent dimensions stop conversion.

The project uses an unsupported layer feature

Make a copy in ReSprite and simplify it to ordinary normal raster layers. Remove groups, clipping masks, special blend modes, or per-cel opacity only when doing so preserves the visual meaning you need. Otherwise, use ReSprite's native Aseprite export.

The project exceeds a browser-local limit

The selected archive is limited to 32 MiB, while expanded entries, decoded pixels, frame counts, layers, and cels have separate allocation limits. Reduce canvas size, frames, or layer count in a copy, or perform the conversion in the source editor.

The output differs from the project

First compare canvas size, frame count, durations, tag ranges, layer order, visibility, opacity, cel coordinates, and transparency. A visual difference involving masks, blends, groups, palettes, or editor metadata usually indicates a format feature outside the documented subset rather than recoverable missing pixels.

ReSprite to Aseprite questions

Can I convert ReSprite to Aseprite online without uploading the file?

Yes, for the supported subset on this page. The app performs the conversion in the browser and offers a local download. No artwork is sent to a project conversion server.

Does the conversion preserve ReSprite layers?

It preserves supported normal raster layers when those layer records and cel PNGs are present in the source bundle. It does not preserve or imitate unsupported groups, clipping masks, special blends, or editor-only features.

Is this better than exporting from ReSprite?

Not universally. ReSprite already provides an official Aseprite export path, so use it when available—especially for projects outside this site's subset. This converter is useful when a transparent, inspectable, browser-local workflow fits your needs.

What should I verify in Aseprite?

Check dimensions, frames, durations, tag names and directions, layer names and order, visibility, opacity, cel placement, transparency, and representative pixels. Follow the site's step-by-step verification method before relying on the result.

For general selection, validation, memory, and download problems, continue with Sprite Converter troubleshooting. The public GitHub repository contains the importer and synthetic tests used to document this supported boundary.