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AjaxUploader v5.2 · ASP.NET Web Forms

Demo library · v5.2

The full v5.2 demo library, one click away.

Every demo is a real au:AjaxFileUpload control on a real Web Forms page, with no sandbox iframes and no mock data. The v5 Transports & Features group at the top covers the 5.2 Companion broker / cloud-source / headless-hook / image-editor matrix; the rest cover the timeless basics (validation, themes, drag-and-drop, queue, image handling, custom UI).

Companion broker 6 cloud sources Headless hooks Smart-crop editor AVIF / WebP 7 transport strategies tus 1.0 resume 28 locales (RTL) Webcam / screen / audio

v5 Transports & Features New in 5.2

The 5.2 showcase. The self-hosted Companion broker (server-side OAuth, proxy and server-to-destination modes), 6 cloud sources (Drive, Dropbox, OneDrive, Box, Unsplash, and Companion), headless hooks for React / Vue / Svelte / Angular, a content-aware image editor (smart-crop, overlays, filters, AVIF/WebP), 7 transport strategies (including direct-to-GCS resumable), AES-GCM client-side encryption-at-rest, cross-tab coordination, IndexedDB resume, webcam / screen / audio capture, and 28 built-in locales (including RTL Arabic, Hebrew, and Persian).

102Direct-to-S3 multipart 103Direct-to-Azure Blob 115Direct-to-GCS resumable 104tus 1.0 protocol 105URL import (NDJSON) 106IndexedDB resume 107Interactive image crop 108Web Worker hashing 109Custom strategy 110Parallel chunk tuning 111Webcam capture 112Screen capture 113Audio capture 114Internationalization (28 locales) 116Custom retry policy 117Cross-tab coordination 118Encryption-at-rest (AES-GCM) 119Remote sources (Drive...) 120Companion broker (server OAuth) 121Unsplash source 122Image editor (smart-crop / AVIF) 123Rename in queue 124Restore prompt 125Form + drop target

Getting Started

1Overview 2Minimal Setup 3Configuration 4Server Controls 5JavaScript API

Basic Upload

6Single File 7Multiple Files 8Auto Upload 9Manual Upload 10Custom Button 11Upload With Form 12Programmatic Upload 13Pre-loaded Files

Validation

14File Extensions 15Max Size 16Min Size 17MIME Type 18Max Count 19Client Validation 20Server Validation 21Image Dimensions 22Duplicate Detection 23Combined Rules 126Aspect Ratio

Appearance

24Default 25Bootstrap 26Tailwind 27Dark Mode 28Custom Colors 29Custom Button 30Icon-Only 31Compact 32Full-Width 33Animations

Progress

34Progress Lab 35Percentage 36Speed & ETA 37Circular 38Striped Bar 39Per-File 40Aggregate 41Custom UI

Drag and Drop

42Basic Drop Zone 43Full Page 44Styled 45Preview 46Multiple Zones 47Folder Upload 48Drop + Browse 49Overlay

Chunked Upload

50Basic Chunked 51Custom Chunk Size 52Resume 53Parallel Chunks 54Large File 1GB+ 55Retry 56SSE Progress 57Chunk Visualization

Queue

58Sequential 59Concurrent 60Reorder 61Pause/Resume 62Cancel 63Priority

Events

64All Events 65Server Events 66Filter OnSelect 67Custom Progress 68Redirect 69Error Recovery 70Event Log

Image Handling

71Preview 72Thumbnail Grid 73Crop 74Resize 75EXIF 76Gallery 77Avatar 78Metadata

Custom UI

79External Trigger 80External Progress 81Custom Table 82Card List 83Inline 84Modal 85Wizard

Integration

86Complex Form 87Email Attachments 88Data Table 89Chat 90CMS Media 91E-Commerce 92Support Ticket 93Multi-Step

Security

94Antiforgery 95Authenticated 96Role-Based 97Virus Scan 98Rate Limiting

Advanced

99SQL Server Provider 100Custom Provider

Clipboard

101Paste Upload

Try it now

AjaxUploader 5.2: a feature-rich upload control for ASP.NET Web Forms.

Multiple files, drag & drop, chunked uploads, direct-to-cloud (S3 / Azure / GCS), encryption-at-rest, offline queueing, image annotation, clipboard paste, virus-scan hook, and deep UI customization - from one server control. Try it below.

Multiple Files

Upload many files at once with progress tracking per file.

Drag & Drop

Drag files from the desktop directly onto the page to upload.

Chunked Upload

Split large files into smaller chunks for reliable transfer.

Image Preview

Show thumbnails before uploading images.

Clipboard Paste

Paste images from the clipboard to upload instantly.

Validation

Validate file types, sizes, dimensions, and counts.

Try It Out

Live uploader preview

This is a real AjaxUploader control rendered directly on the overview page so the demo feels like the CoreUpload overview layout, but for Web Forms.

Open full demo page
Drag & drop files here, or paste from clipboard
<au:AjaxFileUpload ID="OverviewUploader" runat="server"
 AllowMultiple="true"
 AllowedExtensions=".jpg,.png,.gif,.pdf,.doc,.docx,.zip"
 MaxFileSize="10MB"
 AutoUpload="true"
 ShowProgress="true"
 EnableDropZone="true"
 ShowThumbnails="true" />