Open-source alternatives to Uploader

Uploadthing is a tool for integrating file uploads into web applications, providing a system to accept and store files through serverless file handling. It manages the end-to-end upload process, from creating backend endpoints to delivering content via a content delivery network. The project utilizes a presigned URL workflow to allow clients to upload files directly to cloud storage, reducing server ingress. It features a route-based validation system to enforce constraints on file types and sizes, alongside middleware for request authorization and secure post-upload callback webhooks. The p

bootstrap-fileinput is a Bootstrap-compatible HTML5 file upload widget and plugin. It provides a customizable interface for selecting and uploading multiple files, featuring integrated image previews, drag-and-drop support, and client-side validation for file types, sizes, and counts. The project includes a resumable file upload client that slices large files into chunks to ensure stability over intermittent connections and allow transfers to be paused and resumed. It also features a client-side image processor capable of resizing images and reading EXIF metadata to automatically correct imag

Tusd is a server implementation of the open protocol for resumable file uploads over HTTP. It functions as a gateway that streams incoming data directly to local disk or remote object storage backends, ensuring that large files can be processed without exhausting system memory. The server is designed as a modular package that can be embedded directly into existing applications, allowing developers to integrate file transfer capabilities without requiring external service dependencies. It maintains persistent state for all active transfers, enabling clients to pause and resume uploads from the

CloudFlare-ImgBed is a serverless image hosting platform built on Cloudflare Workers, designed to accept, store, and serve images through a global edge network. It runs entirely on Cloudflare's serverless infrastructure, handling requests without persistent servers, and caches public responses at the edge for fast content delivery. The system authenticates programmatic access using time-limited API tokens and automatically converts uploaded images to WebP format while compressing oversized files during the upload process. The platform distinguishes itself through multi-backend storage routing

Uppy is a modular web file upload framework designed for building browser-based uploaders. It functions as a resumable upload client and a system for integrating file uploads from a browser to backend servers or cloud storage. The project provides a headless UI upload component, offering logic hooks and headless elements that allow for the development of custom upload interfaces. It also serves as a cloud storage file importer, utilizing OAuth flows to authenticate and import files directly from remote providers, and as a browser-based media capture tool for uploading images or video clips fr

Webuploader is a browser-based file upload library written in JavaScript. It provides a system for managing multi-file uploads with support for drag-and-drop, clipboard pasting, and type filtering. The library includes a chunked file upload manager that splits large files into smaller segments to improve stability and enable partial retries. It features a client-side image compressor that generates previews and reduces file size before transmission, as well as an MD5 file integrity verifier to identify and skip redundant uploads of files already stored on the server. The tool manages file co

ng-file-upload is an Angular directive for handling multipart file uploads and drag-and-drop selection within Angular applications. It functions as a client-side tool for validating file attributes, processing images, and generating media previews before transmission to a server. The project includes a client-side image processor for resizing, center-cropping, and correcting JPEG EXIF orientation. It also features a browser-based media previewer for images, audio, and video files, and an HTML5 File API shim to provide upload and reader functionality for legacy browsers. Additional capabiliti

Ark is a headless UI component library that delivers accessible, cross-framework primitives with behavior governed by finite state machines. It provides unstyled components that encapsulate logic and accessibility — including full keyboard navigation, focus management, and WAI-ARIA support — while leaving visual styling entirely to the consumer. Components expose scoped data attributes for CSS targeting and use state machines to produce predictable, testable interactive behavior across every state transition. The library distinguishes itself through a state propagation model that distributes

Uploader is a client-side library designed to manage asynchronous file transfers within web applications. It provides a comprehensive suite of tools for handling the entire upload lifecycle, including file selection, validation, transmission, and monitoring. The library distinguishes itself through its integration of drag-and-drop interfaces and structured queue management. It allows developers to organize multiple files into queues for sequential or parallel processing while maintaining programmatic control to start, pause, cancel, or reset individual transfer sessions. Beyond core transfer

This project is a file upload module designed for the AngularJS framework, providing a comprehensive system for managing file selection, validation, and asynchronous transmission. It enables developers to build interactive web interfaces that capture local files through standard inputs or drag-and-drop zones, facilitating the entire lifecycle of a file transfer from initial selection to server-side upload. The library distinguishes itself through its focus on cross-browser consistency and granular control over the upload process. It includes an automatic fallback mechanism that routes data th

This project is a JavaScript UI component library and frontend utility toolkit. It serves as a web modal framework and popup library, providing a specialized system for rendering interactive dialogs, overlays, and layered interfaces over web page content. The library is distinguished by its comprehensive set of overlay tools, including alert dialogs, confirmation prompts, and the ability to embed external content via iframes. It also features a responsive twelve-column grid system for cross-device layout compatibility and an internal modular dependency management system for on-demand loading

This project is a server-side PHP library designed for managing file uploads and performing automated image processing. It provides a structured toolkit for ingesting, validating, and migrating files from temporary staging areas to permanent storage while enforcing security constraints. The library distinguishes itself through a configuration-driven pipeline that executes a sequence of transformations on image buffers. It supports a wide range of geometric adjustments, including resizing, cropping, and rotation, alongside advanced visual enhancements such as watermarks, color adjustments, and

CodeIgniter is a PHP web framework built on the Model-View-Controller pattern, designed for building full-stack web applications. It provides a lightweight toolkit with minimal configuration, organizing application logic into controllers, models, and views for clean separation of concerns. The framework includes a fluent query builder for constructing SQL statements programmatically, PSR-4 autoloading with namespace mapping, and a service-based dependency injection container for managing shared class instances. The framework distinguishes itself through its comprehensive set of built-in tools

FileBrowser is an open-source, self-hosted file management interface that runs as a single binary with no external dependencies. It provides a web-based interface for browsing, uploading, editing, and sharing files on a remote server, with a core architecture built on JWT-based stateless authentication and a rule-based path permission engine that controls access at the directory level. The project distinguishes itself through a comprehensive access control system that supports multi-provider authentication including OIDC, LDAP, external JWT, and two-factor authentication, alongside granular p

Fine Uploader is a browser file upload widget and manager that provides a frontend interface for transferring multiple files. It functions as a chunked file upload manager and a client-side image processor. The project enables the direct transfer of files to cloud storage providers, specifically Amazon S3 and Microsoft Azure, to reduce the load on application servers. It includes tools for scaling and resizing image dimensions during the upload process to save bandwidth. The system manages large file transfers by splitting them into small pieces, allowing for pause and resume functionality.

This project is a jQuery-based file upload widget that provides a browser interface for selecting and transferring files to a server. It functions as a chunked file uploader and a resumable upload client, enabling the transfer of large files by splitting them into smaller segments or continuing interrupted uploads from the last successfully sent byte. The tool includes a client-side image processor for validating, resizing, and generating previews of images before transmission. It also serves as a cross-domain upload tool, using various transport mechanisms to send files to different domains

go-fastdfs is a distributed file system and object storage server designed for building private cloud storage. It provides a FastDFS compatible storage implementation that manages clusters of storage nodes to handle large-scale file uploads and downloads. The system focuses on high availability through a decentralized architecture that automatically synchronizes data and repairs failures across multiple machines without a central coordinator. It specifically supports resumable file storage via HTTP, allowing large transfers to be paused and resumed from the last successful byte to handle netw

o-lib is a digital library client for browsing, searching, and downloading publications from remote server subscriptions. It serves as a desktop application that combines remote resource access with a local content organizer to track reading progress and manage favorite titles. The system manages connections to multiple server lines via manual imports or structured subscription lists and uses concurrent speed testing to verify latency and throughput. It includes a multi-threaded download manager that utilizes byte-range offsets to resume interrupted transfers. The application provides tools

Dropzone is a JavaScript file upload library that provides a browser-based interface for capturing dropped files and transmitting them to a server. It functions as a multipart upload client, splitting large files into smaller chunks to increase transmission reliability and bypass server size limits. The library includes a client-side image processor capable of resizing images and correcting photo orientation in the browser before they are sent to a server. It generates image thumbnails and visual previews immediately after selection, and can render previews for files already hosted on a serve

FileDownloader is an Android HTTP download manager and multi-threaded download engine designed for managing file transfers. It functions as a resumable transfer framework that utilizes a foreground service to maintain persistent background execution and prevent the operating system from terminating active tasks. The project features a pluggable networking library architecture, allowing the replacement of default network, storage, and database implementations with custom components. It employs a multi-threaded engine that increases transfer speeds by splitting files into chunks for simultaneou

dufs is a self-hosted file manager and static file server that provides HTTP file hosting and WebDAV capabilities. It functions as a tool for sharing files over HTTP and managing folders remotely through both a web-based interface and the WebDAV protocol. The server distinguishes itself by mapping incoming requests directly to a local directory structure and offering a single-binary distribution for deployment. It supports the mounting of the server as a network drive via WebDAV and allows for the replacement of the default web interface using customizable asset overlays. The project covers

The application functions as a self-hosted file sharing platform that allows users to transfer files directly through the browser or via cloud storage. It provides decentralized file-sharing utilities that stream encrypted data between client browsers without intermediate storage servers, alongside mechanisms for managing object storage providers and local disk configurations. The system incorporates client-side encryption to secure file payloads within the browser prior to transmission, paired with fallback relay routing to bypass restrictive firewalls through secondary TURN servers when dir

This is a command-line client for managing multiple Aliyun Drive accounts from a single interface. It authenticates each account via an OAuth browser-based login flow, stores tokens separately, and allows switching between active sessions. The tool unifies local and cloud file paths under a common tree structure, enabling consistent browsing, upload, download, and organization across all connected accounts. The client implements several techniques to accelerate and control file transfers. Downloads are split into chunks and transferred concurrently across multiple streams, with progress track

Nuke is an image loading system designed to fetch, cache, and render images and short video clips within a user interface. It functions as an asset caching engine and a resumable download manager to handle the retrieval of remote media files. The framework includes a request priority manager to coordinate duplicate requests and order loading based on visual importance. It employs an image prefetching strategy to load visuals into memory before they are required and uses an LRU asset cache to reduce network traffic. The system covers broader capabilities in traffic management and data storage

This project is an Objective-C HTTP networking library that provides an object-oriented wrapper for CFNetwork to execute synchronous and asynchronous requests on macOS and iOS. It functions as a framework for managing HTTP sessions, performing resumable file transfers, and handling offline content caching. The library distinguishes itself through a resumable file transfer manager that tracks byte offsets and utilizes disk-backed streaming for large uploads and downloads. It also includes a secure credential manager that integrates with the system keychain to handle client certificates and aut

Dropbox-Uploader is a Bash-based command-line client for managing files on Dropbox. It provides a full set of file operations including upload, download, copy, move, rename, delete, directory creation, and listing, all through shell scripts that use curl to interact with the Dropbox API. The tool authenticates via OAuth tokens and includes a chunked upload mechanism for handling large files reliably. The project distinguishes itself with an interactive shell interface that lets users browse and manage remote files without re-entering commands, and a file-name-based password derivation system

MadelineProto is an asynchronous PHP library that provides a programmatic interface for interacting with the Telegram API using the MTProto protocol, the same protocol used by official Telegram clients. It functions as both a Telegram bot SDK and a userbot automation library, enabling PHP applications to connect to Telegram as either a bot account or a regular user account, sending and receiving messages, media, and other data directly without relying on the Bot API intermediary. The library is built on an event-driven architecture with Amp v3 fiber-based concurrency, allowing for non-blockin