Best File Upload APIs (2026): 10 Upload Services and Libraries

Adding uploads to a web or mobile app sounds like one button. It rarely is. Behind that button sit resumable transfers, file type checks, image resizing, storage, delivery and the question of who fixes it when a large upload fails halfway. The ten options below each cover a different slice of that job, in no particular order, so the first decision is which slice you're shopping for.

I've grouped them by what you're buying: a hosted pipeline, a type-safe service for React and TypeScript, a front-end library on its own, or storage you wire up yourself. Most teams end up combining two of these, and that's fine as long as you know which part each one owns.

Two names here come from the same company

This one changes how you shop. Uppy is an open-source JavaScript uploader made by Transloadit, and the company's own page says its hosted uploader is powered by that same library. So these two aren't rivals. Choosing the library means you get the front-end piece for free and handle storage and processing yourself. Choosing the hosted service means you're buying the processing pipeline that sits behind that same uploader.

That's useful if you're not sure how much you need yet. You can start with the open-source widget, and if the processing work starts eating your week, you know where the hosted version lives without changing the interface your users see.

Hosted pipelines that take the whole job

Uploadcare is the best-known name in this group and the one most people compare against. It covers the drop-in uploader, an image CDN, video delivery and a URL API for changes on the fly, so upload through to delivery happens in one place. Filestack leans on the front end: a hosted uploader that pulls from local disk and a long list of integrations such as Dropbox and Drive. Bytescale bundles storage, media processing and delivery, with separate image, video and audio APIs.

These suit a small team that would rather not maintain an upload stack at all. The trade-off is that your files and your processing rules live with the vendor, so read their export options before you commit.

Type-safe services for React and TypeScript

UploadThing covers the path from the upload button on the front end to the server, which makes it a natural fit for full-stack JavaScript apps. EdgeStore is built around type-safe uploads for TypeScript and React, with customisable components and a choice between hosted storage and your own provider. If your team lives in TypeScript and wants the compiler to catch upload mistakes, start here.

A widget on its own

FilePond is a JavaScript library that uploads files, optimises images to speed up uploads and offers an accessible interface. Like the open-source uploader in the section above, it handles the part your users see and leaves storage and processing to you. That's the right call when you already have a back end you trust and only want a better upload experience.

Storage you connect yourself

Bunny Storage is object storage accelerated by a CDN that replicates files to the edge. Pinata manages files on the IPFS network, so it's for apps that want decentralised storage rather than a conventional bucket. Neither is an uploader in the widget sense: you pair them with a library or your own code. For more choices at this layer, see my lists of object storage providers and CDN providers.

Ten upload options side by side

Tool	Kind of service	Most useful for
Bunny Storage	Edge object storage	Fast global reads of files you already upload
Bytescale	Storage and media processing APIs	Storage, media processing and delivery from one provider
EdgeStore	Type-safe uploads for React	Type-safe uploads in TypeScript and React apps
FilePond	JavaScript upload library	A polished, accessible upload widget
Filestack	Hosted uploader and upload API	A hosted uploader with many file sources
Pinata	IPFS file storage	Files stored and served on IPFS
Transloadit	File processing pipeline API	Encoding and processing pipelines behind uploads
Uploadcare	Upload, processing and delivery platform	Upload, processing and delivery in one platform
UploadThing	Type-safe upload service	Upload button to server in one service
Uppy	Open-source JavaScript uploader	A free, resumable uploader you control

All ten, alphabetically

Bunny Storage

Best for: Developers who already handle the upload step and want object storage that a CDN replicates to the edge worldwide, which the vendor calls the fastest edge storage.

Bytescale

Best for: Teams wanting file storage, media processing and content delivery from one provider, with image, video and audio APIs the vendor pitches at developers.

EdgeStore

Best for: TypeScript and React projects needing type-safe uploads with customisable components, on hosted storage or your own provider, plus tools the vendor says suit coding agents.

FilePond

Best for: Front-end developers after a JavaScript library that optimises images before upload and offers an accessible interface, with what the vendor calls a smooth experience.

Filestack

Best for: Websites wanting a ready-made uploader that takes files from local disk and integrations such as Dropbox and Drive; the vendor says it's quick to add.

Pinata

Best for: Apps built on decentralised storage that need to upload, serve and index files across the IPFS network, as the vendor describes its service.

Transloadit

Best for: Products needing one API to upload, process, store and deliver files, including image processing, video encoding and document workflows, per the vendor.

Uploadcare

Best for: Web and mobile apps wanting upload, processing and delivery in one place, with a drop-in uploader, image CDN, video delivery and URL API, per the vendor.

UploadThing

Best for: Full-stack web apps wanting one service that covers the upload button on the front end through to the server, which the vendor calls an easier way to upload.

Uppy

Best for: Teams wanting a free, open-source JavaScript uploader with resumable uploads from disk, Dropbox or Google Drive, for React, Vue, Svelte or Angular.

My advice on picking an upload layer

Draw your upload flow on paper before you open a single sign-up page. Mark where the file starts, where it's checked, where it's resized or encoded, where it's stored and how it reaches the person viewing it. Then circle the parts you don't want to maintain. Those circles are what you're buying, and the groups above map neatly onto them.

Don't pay for processing you won't use. If your app takes profile photos and PDFs, a library plus storage may be all you need for a long time. If you're handling video from customers, a hosted pipeline will save your developers a lot of evenings. And if images are the main load, my guide to image CDNs covers the delivery side in more depth.

Questions to settle before you write any code

• Do files need to survive a dropped connection, so uploads resume rather than restart?
• Will users pull files from cloud drives, or only from their own device?
• Who resizes images and encodes video: your server, or a service?
• Where will files live, and can you move them out later without rewriting the app?
• Does your front end need type safety, or is a plain JavaScript widget enough?
• What happens to uploads that fail a file type or size check, and who sees the error?

Do you make file upload APIs or upload libraries? Tool makers can ask to be considered for a featured place on this list.

Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.

Frequently asked questions

What's the difference between a file upload API and an upload library?

A library is the front-end widget your users see. An upload API is usually a hosted service that receives, stores and often processes the file. Many apps use one of each.

Do I need a hosted service for file uploads?

Not always. If you already run your own back end and storage, an open-source front-end library may be enough. A hosted service earns its place when processing and delivery start taking real developer time.

Which option suits a React or TypeScript app?

Look at the type-safe services first. Both are built for TypeScript and React, and they cover the path from the upload button to the server.

Can I switch upload providers later?

Usually, but check two things before you start: whether you can export stored files in bulk, and whether your front end is tied to the vendor's own widget.

Is this list ranked?

No. The tools are in no particular order and grouped by what you're buying, from hosted pipelines to storage you connect yourself.