Best Svelte File Upload Libraries Compared

The short answer: for a Svelte 5 uploader that sends files straight to your own S3-compatible bucket, with cloud drives and resumable uploads, use upup or Uppy. If you only need the drop zone, svelte-file-dropzone or the one in your UI kit (Skeleton, Flowbite Svelte, shadcn-svelte) is the lightest start, and FilePond gives you one polished component that posts to your server.

Try it first: the live Svelte demo uploads a real file from your browser, and the Svelte quickstart gets it running in your app.

This roundup compares the Svelte file upload libraries and drop zones that usually come up, on the features that decide the choice, then explains how to pick.

Comparison table

The libraries

upup

upup's @useupup/svelte is a native Svelte 5 port of its uploader, not a wrapper around another framework, built on the same headless core as every other upup package. It uploads directly to S3-compatible storage with presigned URLs, either from your own signing endpoint or through @useupup/server, and lets users pick files from the device, Google Drive, OneDrive, Dropbox, Box, a camera, a screen capture or a link. It requires Svelte 5. The built-in image editor is available in the React and Preact packages only; in Svelte the editor is stubbed. See the Svelte file uploader page for a three-step setup.

Uppy

Uppy is a modular uploader. @uppy/svelte provides Svelte components for its UI plugins: the pre-composed <Dashboard />, <DashboardModal /> and <StatusBar />, plus headless components and hooks for building your own UI on Svelte 5. You install @uppy/core and each plugin you use. Plugins cover sources (webcam, screen capture, remote drives through Companion, a server you host) and destinations such as tus and S3. See upup vs Uppy.

FilePond

FilePond is a single animated upload component, and svelte-filepond is its Svelte adapter. It posts files to your own server endpoint, supports chunked uploads, and extends through plugins for previews, validation and image transforms. FilePond itself is still released regularly, but the adapter's last release, 0.2.2, was in December 2023. It was developed against Svelte 3 and declares no Svelte version range, so test it on Svelte 5 before you commit. See upup vs FilePond.

svelte-file-dropzone

svelte-file-dropzone describes itself as a Svelte implementation of react-dropzone. It turns an area into a drop target, filters files by accept, maxSize and minSize, and hands the accepted and rejected files to your drop handler. It does not upload anything, so progress, retries and storage are yours to write. It is MIT-licensed, its peer range covers Svelte 3.54, 4 and 5, and its last release, 2.0.9, was in October 2024. For the same idea in React, see upup vs react-dropzone.

Drop zones in UI kits

Three Svelte UI toolkits ship a drop zone you can start from. Skeleton's FileUpload (in @skeletonlabs/skeleton-svelte) provides a dropzone, a trigger button and a file list. Flowbite Svelte has Dropzone and Fileupload components. shadcn-svelte extras, a community set of shadcn-svelte components, has a File Drop Zone that calls your onUpload function with the files and checks maxFiles, maxFileSize and accept. All of them select files and stop there: the upload request, progress and storage are your code. Skeleton and Flowbite Svelte need Svelte 5.40 or later.

Older packages with similar names

svelte-dropzone has had no release since December 2019, and its GitHub repository is archived. It is not compared above.

A note on "Svelte file manager"

A file manager browses, renames, moves and deletes files that are already in storage. None of the libraries above is one. upup's cloud-drive sources let a user browse their own Google Drive, OneDrive, Dropbox or Box inside the uploader to pick files, but they do not manage the contents of your bucket.

How to choose

• You want a finished uploader on your own bucket: upup or Uppy.
• Your users pick files from Google Drive, OneDrive, Dropbox or Box: upup or Uppy. Uppy routes remote files through Companion; upup does it in the browser (client mode) or in @useupup/server (server mode).
• You are on Svelte 4: upup needs Svelte 5. @uppy/svelte and svelte-file-dropzone accept Svelte 4.
• You only need a drop target: svelte-file-dropzone, or the drop zone from Skeleton, Flowbite Svelte or shadcn-svelte, then write the upload code.
• You already use FilePond elsewhere: svelte-filepond, after checking it on your Svelte version.
• You need image editing in Svelte: Uppy's Image Editor plugin, or FilePond's plugins. upup's editor is not available in Svelte.
• You upload very large files: use resumable uploads, with upup or Uppy.

Minimal upup example

Install the package:

npm i @useupup/svelte

Render the uploader and point it at an endpoint that returns a presigned URL:

<script lang="ts">
    import { UpupUploader } from '@useupup/svelte'
    import '@useupup/svelte/styles'
</script>

<UpupUploader provider="aws" uploadEndpoint="/api/upload-token" />

upup requires Svelte 5. The Svelte quickstart covers the endpoint, and Code Examples has a ready-to-copy presign handler.

FAQ

What is the best file upload library for Svelte?

For a complete uploader against your own storage, upup or Uppy. For only a drop zone, svelte-file-dropzone or the one in your UI kit. For one polished component that posts to your server, FilePond through svelte-filepond.

Which Svelte upload libraries upload directly to S3?

upup, with presigned URLs from your endpoint or @useupup/server, and Uppy, with its AWS S3 plugin. With the others you write the S3 signing and upload code yourself.

Does upup's Svelte package include the image editor?

No. The image editor ships in @useupup/react and @useupup/preact only. Everything else, including cloud drives, camera, screen capture and resumable uploads, works the same in Svelte.

Do these libraries work with Svelte 5?

upup requires Svelte 5. @uppy/svelte accepts Svelte 4 or 5, and its headless components and hooks are Svelte 5 only. svelte-file-dropzone accepts Svelte 3.54, 4 or 5. Skeleton and Flowbite Svelte need Svelte 5.40 or later. svelte-filepond declares no Svelte range and was last released in December 2023, so test it on Svelte 5 first.

Is there a Svelte file manager component?

None of these is a file manager. They select and upload files, and do not browse, rename or delete files already in storage. upup can browse a user's Google Drive, OneDrive, Dropbox or Box to pick files for upload.

Are these libraries free?

Yes. upup, Uppy, FilePond, svelte-file-dropzone, Skeleton, Flowbite Svelte and shadcn-svelte extras are MIT-licensed. FilePond's full image editor, Pintura, is a separate commercial product.

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