How many images can I resize at once?

You can process dozens or hundreds of images simultaneously. Because processing runs in your browser using multi-threaded web workers, batch size is limited only by your computer's RAM.

Can I convert formats while resizing in bulk?

Yes. You can convert your batch between JPG, PNG, and modern high-efficiency WEBP formats during the resizing process.

How do I download the resized images?

You can download images individually or click 'Download All as ZIP' to receive an organized ZIP archive containing all processed files.

Does bulk resizing preserve image aspect ratios?

Yes. You can choose between 'Fit' (maintains proportions), 'Fill' (crops to fit), 'Exact Stretch', or percentage-based scaling.

Are my images uploaded to an external server?

No. All resizing, conversion, and compression operations run 100% locally on your device with complete privacy.

What are the file size and batch size limits for bulk resizing?

Each individual image can be up to 500 MB. While there is no hard ceiling on the number of images you can batch, the tool will alert you if your total batch volume crosses 5 GB to safeguard your browser memory.

What image formats can I batch resize and convert?

The bulk resizer supports JPEG, PNG, WebP, GIF, AVIF, BMP, TIFF, SVG, and HEIC files, letting you convert them into uniform WebP, JPG, or PNG files with customized quality settings.

Does bulk resizing work with ultra-high-resolution images (4K / 8K)?

Yes. The engine uses multi-threaded browser canvas processing without artificial resolution caps, allowing you to scale DSLR and 8K wallpaper images smoothly.

image-file-tools100% Client-Side LocalPopular

Bulk Image Resizer – Resize Multiple Images Online

Resize, compress, and convert hundreds of images directly in your browser — no uploads, no limits. Choose from 5 resize modes (exact dimensions, percentage, longest/shortest side, max width/height), convert to JPEG, PNG, WebP, or AVIF, control quality, set a target file size, generate multiple output sizes per image, maintain aspect ratio, preserve EXIF metadata, rename files, use quick presets for social media & web, and download everything as a ZIP — all with zero server uploads.

Privacy Guarantee: Your files are processed locally in your browser and are not uploaded to our servers. Batch processing runs directly in client RAM.

100% Browser-Based Processing No Artificial Image Limit

Unlimited local batch processing · Zero server uploads

Upload Images

Drag and drop, browse, or paste images with Ctrl+V.

No artificial image limit

Drag & drop images or tap to browse

Browse files or paste images from your clipboard

JPG, PNG, WebP, GIF, AVIF, BMP, TIFF, SVG, HEIC

Upload Notice: By uploading, you confirm you have necessary rights to process these files.

Resize Settings

Choose how you want to resize your images.

Resize Mode

Width (px)

Height (px)

Maintain Aspect Ratio

Fit dimensions proportionally.

Allow Upscaling

Enlarge images beyond original dimensions.

Output Settings

Set output format, compression quality, and file naming.

Output Format

Output Quality82%

Higher = better quality, larger file. Lower = smaller file.

Rename Files

Processing Summary

Images

Original Size

0 B

Your images are processed locally and never uploaded to our servers.

About Bulk Image Resizer

Bulk Image Resizer is a powerful, privacy-first web utility that handles batch image modification entirely in your browser using Web Workers and OffscreenCanvas. Your images never leave your device.

5 Resize Modes: Exact Dimensions, Percentage, Longest Side, Shortest Side, Maximum Width / Height
Output Formats: JPEG, PNG, WebP, AVIF — keep original or convert
Quality Control: Fine-tune compression from 1–100 for lossy formats
Target File Size: Automatically dial quality to hit a specific KB/MB output
Multi-Size Output: Generate multiple resized versions (e.g. 1920px, 1200px, 800px) per image in one pass
Aspect Ratio & Upscaling: Maintain proportions or allow enlarging images beyond original size
Quick Presets: Social Media (Instagram, YouTube, Facebook), Website, and E-Commerce presets for instant setup
File Renaming: Keep original names, sequential numbering, or add custom prefix / suffix
Preserve Metadata: Best-effort EXIF data retention during re-encoding
Batch ZIP Download: Download all processed images in a single ZIP file

Why Choose SPAUL Hub?

100% Private & Secure: Since processing happens entirely in your browser, your files are never uploaded to any server.
Lightning Fast: Web Worker pool with controlled concurrency means efficient processing without freezing the UI.
Completely Free: Access all batch-resizing features without any subscriptions or usage caps.

How to Use This Tool?

Upload Images

Drag and drop any number of images, click to browse, or paste directly using Ctrl+V.

Set Dimensions

Choose resizing by exact dimensions, percentage, longest/shortest side, or max size. Use presets for quick setup.

Configure Output

Select file format (JPEG, PNG, WebP, AVIF), set compression quality, target file size, or enable multi-size output.

Download

Click 'Resize Images' to process locally, then download individual files or package everything in a single ZIP.

Explore Other Image & File Tools

Photo & Signature Resizer

Resize, compress, and convert images to exact file sizes. 100% local processing.

Bulk Image Merger

Combine photos into vertical strips, horizontal layouts, or responsive grids.

Photo Metadata Viewer

Strip private GPS location and metadata from your photos before sharing.

ZIP File Size Reducer

Shrink large ZIP files directly in your browser with smart recompression.

Bulk Image Resizer FAQ

⚠️ Disclaimer

Bulk Image Resizer processes your images locally using browser APIs. Results depend on the browser's codec support and available device memory. AVIF encoding may not be supported in all browsers and will fall back to JPEG. Target file size is best-effort and may not be exactly achievable for all image types — PNG output remains lossless regardless of the target. EXIF metadata preservation is best-effort and may not be retained across all format conversions.

🛡️ Privacy Focused

All image processing runs entirely in your browser using Web Workers and OffscreenCanvas. No image data is ever sent to any server. Your files stay completely private on your device.

Companion Guides & Technical Insights

All Guides

Media & FilesMay 2, 2026

Reducing Photo and Signature Size for Government Exams: A Simple Guide

Struggling with 20KB-50KB limits for online applications? Learn how to resize and compress photos and signatures instantly.

Read Article

Related Tools

Similar utilities & calculators

Free Photo & Signature Size Reducer – 20KB, 50KB & More

Resize and compress images to 20KB, 50KB and other target sizes for government exams, ID documents and social media. Free, secure browser-based image resizer.

image file-tools

Popular

Bulk Image Merger – Merge Multiple Images Online

Merge multiple JPG, PNG and WebP images into one image for free. Create vertical, horizontal or custom layouts with secure browser-based processing and no uploads.

image file-tools

Photo Metadata Viewer & EXIF Inspector

View hidden EXIF data, GPS location, camera details and timestamps with this free Photo Metadata Viewer. Analyze AI-generated image indicators privately with no uploads.

image file-tools

Bulk Image Resizer – Resize Multiple Images Online

Upload Images

Resize Settings

Output Settings

Advanced Options

Processing Summary

About Bulk Image Resizer

Why Choose SPAUL Hub?

How to Use This Tool?

Upload Images

Set Dimensions

Configure Output

Download

Explore Other Image & File Tools

Photo & Signature Resizer

Bulk Image Merger

Photo Metadata Viewer

ZIP File Size Reducer

Bulk Image Resizer FAQ

⚠️ Disclaimer

🛡️ Privacy Focused

Companion Guides & Technical Insights

Reducing Photo and Signature Size for Government Exams: A Simple Guide

Related Tools

Free Photo & Signature Size Reducer – 20KB, 50KB & More

Bulk Image Merger – Merge Multiple Images Online

Photo Metadata Viewer & EXIF Inspector

Upload Images

Resize Settings

Output Settings

Advanced Options

Processing Summary

About Bulk Image Resizer

Why Choose SPAUL Hub?

How to Use This Tool?

Upload Images

Set Dimensions

Configure Output

Download

Explore Other Image & File Tools

Photo & Signature Resizer

Bulk Image Merger

Photo Metadata Viewer

ZIP File Size Reducer

Bulk Image Resizer FAQ

⚠️ Disclaimer

🛡️ Privacy Focused