What image formats are supported for input and output?

You can import PNG, JPEG, WebP, AVIF, BMP, GIF, SVG, and ICO formats, and export or convert them into WebP, AVIF, JPEG, PNG, or BMP formats.

Free Bulk Image Resizer & Converter

Q: Are my images uploaded to any server?

No. FreeWebResizer processes all photos directly inside your web browser using HTML5 Canvas and WebAssembly APIs. Your files never touch a remote server.

Q: How many images can I resize at once?

There are no artificial limits. You can drag and drop dozens or hundreds of images at once, constrained only by your device's available memory.

Q: What is the difference between WebP and AVIF formats?

Both are next-gen image formats. WebP offers universal browser support and fast encoding. AVIF delivers up to 30% smaller file sizes than WebP at equivalent visual quality.

Resize, convert, and compress PNG, JPG, WebP, AVIF, BMP, GIF, and SVG images instantly in your browser. 100% free, unlimited, and completely private with zero server uploads.

Resize Controls

Resizing Mode

Max Width (px)

Max Height (px)

Maintain Aspect Ratio

Output Format

Quality 85%

Naming Rule

Tags: {name}, {w}, {h}

Drag and drop images here, or browse

Supports PNG, JPEG, WebP, AVIF, BMP, GIF, SVG up to 100+ files

How to Resize & Convert Images in 3 Steps

Upload Your Photos

Drag and drop single or batch images into the web dropzone. Formats like PNG, JPG, WebP, AVIF, BMP, GIF, and SVG are supported.

Configure Dimensions & Format

Set width and height or scale by percentage. Choose your target output format (WebP, AVIF, JPEG, PNG, or BMP) and quality level.

Process & Export

Click process to resize all images instantaneously in your browser. Download files individually or export the full batch in a single .ZIP file.

Why Use FreeWebResizer.com?

100% Client-Side Privacy

Unlike conventional web utilities, FreeWebResizer processes photos locally in your browser canvas. Your confidential images never leave your computer or get saved on external servers.

Zero Wait Times & No Limits

Since calculations happen on your hardware using modern WebAssembly logic, batch image resizing is blazing fast with zero artificial limits or subscription paywalls.

Next-Gen AVIF & WebP Conversion

Convert heavy JPG, PNG, and BMP photos into lightweight WebP or ultra-compressed AVIF formats to boost website loading speeds and improve Google PageSpeed insights scores.

Batch ZIP Archiving

Save time by batch-resizing hundreds of ecommerce or photography assets and saving them directly as an organized ZIP archive with customizable file naming rules.

Frequently Asked Questions

Are my images uploaded to any server?

No. FreeWebResizer operates entirely client-side using JavaScript and Canvas APIs. Your files are processed inside your browser runtime and are never uploaded to remote cloud servers.

How many images can I resize at once?

There are no artificial limits placed on batch sizes. You can drag and drop dozens or hundreds of images simultaneously depending on your device memory.

What image formats can I convert?

FreeWebResizer supports reading PNG, JPEG, WebP, AVIF, BMP, GIF, SVG, and ICO files, and exporting them into WebP, AVIF, JPEG, PNG, or BMP formats.

Can I convert WebP or AVIF back to JPG or PNG?

Yes! FreeWebResizer works bi-directionally. You can drag and drop WebP or AVIF files into the tool and select JPG or PNG as the target output format.

Does resizing images affect transparency in PNG or WebP files?

No. When converting or resizing transparent PNG or WebP images to lossless formats (like PNG or WebP), the transparent background layer is fully preserved.

What is the difference between WebP and AVIF formats?

Both are next-gen image formats designed for web performance. WebP offers universal browser support and fast encoding. AVIF delivers up to 30% smaller file sizes than WebP at equivalent visual quality.

Will resizing reduce image quality?

Downscaling images preserves sharpness while reducing file size. When upscaling beyond original dimensions, images may appear slightly soft or pixelated.