v5.3 for ASP.NET Web Forms

Modern file uploads.
Built for Web Forms.

Give your ASP.NET app drag-and-drop uploads, automatic retries, and direct-to-cloud transfers. Keep your Web Forms workflow and control where every file goes.

Self-hosted Direct to cloud 4.x compatibility Image editing

Explore live demos → Download free trial

Working with ASP.NET Core? Meet CoreUpload.

7upload strategies

IISself-hosted deployment

4.xupgrade compatibility

File workspaceUI preview

Your files, ready to go.

A clear path from selection to storage.

Drop files. Keep moving.

Multiple files. Clear progress. Your storage.

Try the upload demos

EXAMPLE QUEUE3 files

product-photo.webp2.4 MB · Image

Complete

project-assets.zip48 MB · Uploading

74%

project-brief.pdf840 KB · Document

Complete

Resumable uploads Direct to cloud

Trusted upload technology for established .NET teams

What you can ship

A better upload experience. Inside your existing app.

Direct-to-cloud transfers

Upload directly to S3-compatible storage, Azure Blob, or Google Cloud Storage using server-generated signatures.

Resume and recover

IndexedDB-backed state lets interrupted uploads continue after reloads, tab crashes, and connection drops.

Validate before storage

Check size, extensions, MIME type, image dimensions, duplicate files, custom rules, and scan hooks.

Beyond the upload button

From file selection to the final image.

Companion broker

Connect cloud accounts through the self-hosted Companion broker. Keep provider secrets and access tokens on your server.

Files from more places

Let users choose files from Google Drive, Dropbox, OneDrive, and Box, or find images with Unsplash search.

Headless framework hooks

Build your own interface with React, Vue, Svelte, or Angular hooks. Access file state, progress, and upload actions from your components.

Content-aware image editor

Crop around a focal point, add text and stickers, and adjust color before upload. Export to AVIF or WebP with adjustable quality.

Image pipeline

Correct image orientation, preview PDFs, and decode HEIC files. Apply reusable image presets and server-side transforms.

UX and accessibility

Let users rename files, restore interrupted uploads, and drop files anywhere on the page. Localized text, RTL support, and live status announcements help more people use your app.

Transport

Seven strategies, one server control.

Switch transport behavior without redesigning your upload page. Start simple, then move heavy files directly to cloud storage when the app needs it.

View features Browse demos

singleStandard multipart POST for small forms.

chunkedParallel chunks, retry, server-side assembly.

s3 / azure / gcsBrowser-direct uploads using signed URLs.

tusResumable tus 1.0 protocol support.

urlImportServer fetch with live NDJSON progress.

Why AjaxUploader

Your app. Your storage. A focused upload control.

Add the upload features your users need with familiar server controls, deployment guidance, and perpetual licensing.

Focused licensing

Buy the uploader you need.

Get upload controls, demos, and integration guidance in one package. Add file uploads without adopting a complete UI suite.

Familiar integration

Stay in your Web Forms workflow.

Work with server controls, validation events, and temporary storage in your ASP.NET application. Follow the included examples from setup to deployment.

Infrastructure control

Choose where your files live.

Host the upload handler yourself or send files directly to your cloud storage with signed URLs. Keep storage and deployment choices with your team.

Starting with <asp:FileUpload>? Compare the built-in control with AjaxUploader →

Self-hosted Handlers, temp storage, signatures, and Companion broker under your control.

Web Forms-native Server controls, postback-aware events, Web.config guidance, and Visual Studio demos.

Uploader-only pricing Perpetual licenses starting at $99 instead of a full suite or metered upload platform.

Uploader family

Same upload core, matched to your stack.

ASP.NET Web Forms

AjaxUploader

Server controls, Visual Studio-friendly demos, and 4.x compatibility for long-lived Web Forms applications.

ASP.NET Core

CoreUpload ->

Tag Helpers, Razor components, Minimal APIs, and .NET 8+ integration.

Standalone JavaScript

MultipleUpload ->

Zero-dependency upload UI and transport engine for any backend.

PHP

PHP File Uploader ->

The same upload UI for PHP applications, with progress, validation and large-file support.

Classic ASP

ASP Uploader ->

Pure script for Classic ASP on IIS — no COM component to register.

From evaluation to integration

Start with a working example.

Choose your workflow, test it locally, then connect it to your application.

Find your upload workflow

Explore drag and drop, large files, validation, and cloud storage demos.

Browse demos → 02

Try it in your project

Download the evaluation package and run the Web Forms examples locally.

Get the free trial → 03

Make it your own

Follow the quick start to configure the control, handler, and upload destination.

Read the quick start →

A few useful answers

Before you get started.

Have a question about your application?Talk to our team →

Is AjaxUploader right for my .NET app?

AjaxUploader is built for ASP.NET Web Forms on .NET Framework. For ASP.NET Core, Razor, Blazor, or Minimal APIs, explore CoreUpload. Check the system requirements before installing.

Can I keep files on my own infrastructure?

Yes. Use a self-hosted upload handler or upload directly to S3-compatible storage, Azure Blob, or Google Cloud Storage with server-generated signatures. See the deployment guide.

Can I evaluate it before buying?

Yes. Download the evaluation package and run the examples locally without a production license key. Review licensing options when you are ready to deploy.

What if my application uses version 4.x?

Version 5 includes compatibility support for existing integrations. Follow the upgrade guide and test your controls, events, and configuration before moving to production.

Make your next upload a better one.

Download the evaluation package and try it in your Web Forms project. Local testing needs no production license key.

Download free trial

Modern file uploads.Built for Web Forms.