Download Utils

Download Utils downloads large files in Unity reliably. A download continues where it stopped after a network failure, a domain reload or an Editor restart, and it never leaves a broken file that looks complete.

It is for package and project developers who must fetch files that are too large to ship: AI models, datasets, media or other remote content.

What you get

	Feature	Where
⬇️	Resumable downloads: continue with HTTP Range, replace the target only when the file is complete	Editor and players
🔒	File locks: keep two Editors from writing the same file	Editor and players
🔁	Persistent Editor operations: a queue of work that survives domain reloads, with a Background Tasks entry and a cancel button	Editor

Download a file

using System.Threading;
using Doji.Downloads;

var downloader = new ResumableDownloader();
await downloader.DownloadFileAsync(
    "https://example.com/model.onnx",
    "Library/MyPackage/model.onnx",
    expectedSizeInBytes: null,
    progress: null,
    CancellationToken.None);

If the download fails, call it again: it continues from the bytes already on disk. Getting started explains installation and the first download.

The Scripting API describes every type and member.