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Files API & SDK

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What is a Files API?

What is a Files API?

A Files API, or Application Programming Interface for files, is a set of rules and protocols that enable apps or web platforms to perform file handling operations on a file server. A file server acts as a centralized location for storing data files over a network to enable users to distribute the files remotely. A Files API makes it possible for developers to build apps with various file-related features such as uploading, retrieving, updating, or deleting files. These features are vital for products that require content uploading, file sharing, file conversion, and more.

File sharing API refers to APIs specifically designed to facilitate the sharing of files between users or systems. For instance, the Dropbox and Google Drive APIs provide endpoints for sharing files or folders stored in Dropbox and Google Drive. This might include creating a shared link for a file, sending a file to another user, or even managing permissions for shared files. Such APIs make it easier for applications to incorporate file sharing features, thereby enhancing collaborative efforts. Combined with a files API, these can create a much richer user experience in your app.

Files API Examples

Developing file handling functionality is a difficult and costly endeavor. It requires creating discrete functions for uploading, sharing, downloading, modifying, syncing, and many more functions users have come to expect from file handling applications. Files APIs provide developers with a shortcut, allowing them to build on the work and experience of other developers.

There are many examples of Files APIs, and each come with different feature sets and functionalities. Some Files APIs like Uppy are more focused on providing a file uploader functionality for apps. Other, more holistic files APIs like Weavy or Transloadit are oriented around creating a complete file handling experience inclusive of uploading, downloading, and sharing files.

Some Files APIs also allow users to connect the host app to their cloud storage solution, such as Google Drive, Dropbox, Microsoft OneDrive, or Box. Each of these cloud providers offer their own files APIs for these integrations. These APIs can be used in conjunction with files API examples like Weavy in order to offer a mixture of storage options for users.


As well as more intensive functions such as searching for files, and sharing files with other users. The ability to perform these tasks programmatically through an API can greatly enhance the functionality of an application, providing users with seamless file management capabilities.


A Files API is a vital tool for content uploads. It facilitates the transfer of files from a user's device to a server or cloud storage system. A robust Files API would handle large file uploads, resume broken uploads, and ensure secure and efficient transfer of data.


A Files API is an essential tool in modern app development, providing a structured way to interact with file systems and services. Whether you're working with file sharing, content uploading, or other file operations, a Files API can greatly enhance the capabilities of an application, providing a richer and more seamless user experience.

Files API frameworks

As developers explore different frameworks and libraries to interact with Files APIs, they'll find a variety of choices each with its unique characteristics and advantages. These APIs are often developed with specific frontend frameworks in mind to ease the integration of file handling capabilities into an application, handling a range of tasks from content upload to file conversion, and more.


File APIs are often designed to work with various file types in different formats. From standard file formats such as .jpg, .png, .pdf, .docx to more specialized formats, these APIs enable developers to upload, download, convert, or share files in these formats, providing extensive file handling capabilities to users. Certain Files APIs also provide additional features such as file compression or metadata extraction to offer developers an insightful look at additional information about the files.


For developers working with Java, there are a multitude of files API java libraries that allow seamless interaction with file systems. These Java files libraries include functionalities for common operations such as file creation, deletion, reading, and writing, as well as more advanced features such as file attribute manipulation and file system operations.

Javascript and React

In the JavaScript ecosystem, particularly for those building Files with the popular React technology, libraries and React UI kits simplify the implementation of file management features such as uploads, downloads and even file sharing amongst users within the web application. This enables developers to deliver a seamless file handling experience within their React applications without having to make compromises on performance.


No matter which frontend framework you choose to work with, there are a plethora of frameworks and libraries available to streamline the integration of file handling capabilities into your application. These tools are pivotal in enriching an application's capabilities, contributing to a more engaging and smooth user experience that increases engagement, reduces churn, and helps increase a customer’s long term value.

File API features

File API features bring a host of benefits to developers, enhancing the functionality of applications by integrating file management functionality. Whether you're dealing with media files or business documents, these files API features can significantly improve an application's capabilities and the overall user experience.


File uploader

A file uploader is exactly what it sounds like: a way for users to upload files stored locally on their computer to an application, usually stored on a dedicated server or a cloud storage solution. Today most file uploaders operate via an API that connects the document handling protocols with an easy to use interface on an application’s front end. Most file uploader solutions offer a drag and drop interface, a dialog box interface, or some combination of the two.


A file uploader for a website is a common example. Many websites require users to upload files, whether it's a social media site where users share images and videos, an e-commerce platform that allows sellers to upload product photos, or a job portal where candidates upload their resumes. Implementing a reliable, user-friendly file uploader can significantly improve the user experience of a website. There are also a few file upload as a service platforms that handle file uploading and sharing without the level of organization of a typical cloud storage provider. 


Instead of building a file uploading system from scratch, developers can use Files APIs to integrate these services to save time and ensure a more robust and secure file upload functionality. While there are many file upload APIs, several files APIs handle a wide variety of functions. These APIs define how the client application communicates with the server to initiate file uploads, monitor progress, and handle responses from the server. Using these APIs, developers can integrate file upload capabilities into their applications with greater ease and efficiency. Via an API file download operation, users can retrieve and download previously uploaded or shared files.

File Versioning

One common feature offered by Files APIs is file versioning. This feature allows applications to maintain different versions of a file, tracking and storing each modification made to the file over time. Users can view previous versions, revert changes, and compare different versions of a file, providing a robust solution for document management, especially in collaborative environments. File versioning can help prevent data loss due to accidental overwrites or deletions and is an essential feature for applications dealing with shared resources.

Document Sync

A crucial feature that goes hand in hand with file versioning is document sync. With this feature, changes made to a file are synchronized across all instances of the file in real-time. This means that if a user modifies a file on their desktop application, the changes are immediately reflected in the cloud and on any other devices where the user accesses the file. Document sync ensures consistency across devices, enabling users to access the most recent version of their files from anywhere, at any time. It also facilitates collaboration, as multiple users can work on the same document concurrently without conflicts.

File Previews

File previews are another key feature provided by many Files APIs. This feature generates a preview of a file without requiring the user to download the file or have the corresponding software installed on their device. For example, users can view previews of image files, PDF documents, or even video files directly in the application. File previews improve the user experience by providing quick access to file content and reducing the need for multiple software dependencies.


Files API Provider

A Files API Provider is a third-party service that handles all the complexities of building and maintaining a files server. These complexities includes automatically scaling the files server or provisioning database and virtual machine resources to store data and run the backend applications respectively. 

Developers integrate Files API providers into the frontend client of their product either through a Files API or Files SDK supported by the Files Provider. To minimize cost, Files API Providers use a Pay-As-You-Go (PAYUG) model to ensure that developers only pay for the resources their frontend clients consume.

Files API 

An API is the communication protocol for interacting with a service. A Files API makes it possible for developers to integrate a Files server into their frontend clients and perform CREATE, RETRIEVE, UPDATE and DELETE (CRUD) operations on the chat resources created by the Files API Provider.  

Developers access Files APIs over secure or encrypted HTTP connections through their REST or GraphQL endpoints and they require authentication to protect sensitive user data.

Files SDK

A Software Development Kit (SDK) contains lines of well-documented code for developers to use when building an application. In most cases, an SDK abstracts over an external API and provides easy-to-use methods or functions to interact with. 

In a Files context, a Files SDK makes it less complex for developers to build a files application as it abstracts over the Files API and handles difficult aspects of working with the Files API such as managing the API authentication state, request or timeout retries.

Files UI Kit

A User Interface (UI) Kit is a package of files designed to expedite the development of a user interface. UI Kits include important visual components such as fonts, Cascading Style Sheets (CSS) or Hypertext Markup Language (HTML) stylesheets, and graphical elements such as containers, input controls, navigation controls, and icons. 

Most UI kits are designed for specific frontend libraries or framework such as Vue, React, or Svelte.

Files API & your app

Better together

Weavy's Files API and developer tools are designed to make your app a file management powerhouse without diverting from your core offering or taking on additional technical debt

Feature complete

Everything users expect from Files built and ready to embed.

UI kits

UI components pre-built for various frameworks for fast frontend deployment.

Built to serve

Host from the cloud, on prem, and anything in between.

Packet managed

Install Files components directly from NuGet and npm.

Ready, fork, develop

Get our Open Source UI components on GitHub - clone, fork, and start developing.

Deploy in minutes

Spin up a fully functional Files server in minutes using .

Designed for developers

Take the reins

Leverage our application development tools to help you get a fully-featured in-app files experience across the finish line

UI Components

Open-Source, feature-complete Files UI components for your tech stack.


Files API with endpoints for manipulating objects such as users, files, and more.


Webhooks to build integrations that subscribe to events on the Files backend.