BulkResizeImages.online is a free, browser-based batch image resizer that processes all files locally without uploading.
What is BulkResizeImages.online?
BulkResizeImages.online is a free online tool that resizes multiple images in batches entirely within your web browser. It accepts images in JPEG, JPG, PNG, WebP, SVG, AVIF, GIF, APNG, HEIC, and HEIF formats and outputs resized versions with no upload required — every file stays on your device. The tool runs as a Progressive Web App (PWA) and can be installed for offline use.
Key Features
- Zero-upload privacy — all image processing happens locally in your browser’s secure sandbox; images never leave your device.
- Multi-format support — accepts JPEG, JPG, PNG, WebP, SVG, AVIF, GIF, APNG, HEIC, and HEIF input files; output format can be chosen.
- Bulk processing — resize up to 50 files simultaneously, each up to 50 MB.
- Lanczos3 resampling algorithm — delivers high-quality downscaling with sharp edges and consistent sRGB color profiles.
- PWA & offline capability — install the tool as an app and continue using it after disconnecting from the internet.
- Free forever — no sign-up, no watermarks, no credits, and no usage limits.
Who should use BulkResizeImages.online?
- Shopify store owners — batch resize product thumbnails to uniform dimensions for consistent listing images.
- Frontend developers — optimize image assets to meet Core Web Vitals by resizing to exact dimensions or target file sizes.
- Photographers — prepare galleries for client review by resizing high-resolution RAW exports to web-friendly sizes.
- Social media managers — quickly resize images to platform-specific dimensions using built-in presets.
What can you do with BulkResizeImages.online?
- Resize by exact dimensions — set specific width and height (in pixels) to get perfectly uniform images for printing or web layout.
- Resize by percentage — scale all images up or down proportionally (e.g., 50% to halve dimensions).
- Resize by target file size — compress a batch to roughly match a chosen file size (e.g., under 200 KB) for faster uploads.
- Apply social media presets — quickly choose preset dimensions for platforms like Facebook, Instagram, Twitter, and LinkedIn.
How does BulkResizeImages.online work?
- Select — drag and drop or browse to choose your images (up to 50 files, each up to 50 MB).
- Resize — choose your resize mode: exact dimensions, percentage, or target file size; adjust settings like quality and output format.
- Download — click resize and the tool processes all images instantly using WebAssembly and multi-threaded web workers in your browser, then offers a single ZIP download or individual files.
FAQ
Is this image resizer really free?
Yes, BulkResizeImages.online is 100% free with no limitations, no watermarks, and no sign-up required. You can resize unlimited images.
The tool accepts JPEG, JPG, PNG, WebP, SVG, AVIF, GIF, APNG, HEIC, and HEIF formats for input and can output in JPEG, PNG, WebP, or keep the original format.
Is my data secure?
Absolutely. All processing happens locally in your browser — your images never leave your device. You can verify this by loading the page, disconnecting from the internet, and using the tool without interruption.
File size increased unexpectedly?
This can happen if your settings produce highly detailed images. To keep file sizes minimal, try saving in WebP format with Quality set to 80% or below. Also check that you are not upscaling the image resolution.
