Drop your images
Drag a whole folder onto the box above, or click to browse. JPG, PNG, WebP and GIF all work.
Bulk resize images in your browser
Drop a folder, pick a max width and height, download a ZIP. Up to 20 images free — and they never leave your computer.
Drop images here
or · JPG, PNG, WebP, GIF
How it works
Set your max dimensions
Enter a maximum width and height. Images smaller than the cap are left alone; larger ones are scaled down proportionally — no stretching.
Download the ZIP
Every resized image is packaged into a single ZIP, with a before/after size report for each file.
Questions
Are my images uploaded to a server?
No. The resizing happens in your browser using the canvas API. After the page loads, the tool makes zero network requests — you can even turn off your wifi and it still works.
How many images can I resize at once?
The free web version handles 20 images per batch. The desktop version of Bulk Image Kit has no limit.
Will resizing reduce quality?
Downscaling with high-quality smoothing keeps images sharp. You also control the output quality slider, so you can trade file size against fidelity yourself.
Does it keep the aspect ratio?
Yes. The tool fits each image inside your max width/height box, so proportions are always preserved. Nothing gets squashed.
Common resize targets, and why they exist
Most "why does my upload look wrong" problems are a size mismatch, not a compression problem. These are the caps that actually reject or degrade uploads in the wild.
| Case | Value | Why it matters |
|---|---|---|
| Email attachment (Gmail) | 25 MB total per message | Images over ~5 MB each usually blow the cap once base64 encoding adds its 33%. |
| Instagram feed post | 1080 px wide | Anything larger gets downscaled by Instagram anyway — you lose control of the sharpening. |
| Etsy listing | 2000 px shortest side | Below this, the zoom view goes soft and buyers assume low quality. |
| eBay listing | 1600 px longest side | eBay upscales smaller images to fill the gallery frame, which looks blurry. |
| Shopify product | 2048 × 2048 | Required for the hover-zoom feature to actually have pixels to zoom into. |
| WordPress upload | 2560 px, along the long edge | Above this WordPress silently generates an oversized "scaled" version you never see. |
Five mistakes that waste the most time
Upscaling a small image
Making a 600 px photo "2000 px" does not add detail. You get a bigger file that looks softer than the original. This tool never upscales — small images pass through untouched.
Resizing with a fixed width only
Setting width 2000 and letting height float gives you a 2000 × 3000 portrait for a grid that wants squares. Always set both caps.
Re-saving JPEG three times
Every JPEG save is lossy. Resize once, from the original, and keep that original archived.
Forgetting transparency
PNG logos resized into JPEG turn their transparent background white. Set the output format to WebP or PNG instead.
Resizing after sharpening
Sharpen after resizing, never before. Resizing first and sharpening second is the correct order — most people do it backwards.
Free web version vs the $19 desktop app
| Free, this page | Bulk Image Kit $19 | |
|---|---|---|
| Images per batch | 20 | Unlimited |
| Transparent PNG output | Flattened to white in JPEG mode | Full alpha preserved |
| Watermark | Text only, 5 positions | Text + PNG logo overlay |
| Batch rename | Fixed suffix | Pattern-based rename |
| Works offline | Yes, after first load | Yes, always |
| Files uploaded | None | None |
More questions
Can I resize a whole folder at once?
Yes. Drag the folder onto the drop zone — your browser expands it into individual files. Browsers do not tell a page the folder name, so all images land in one flat list.
What happens to EXIF orientation?
Modern browsers apply the EXIF rotation when decoding, so phone photos come out upright. The metadata itself is dropped in the process — which is generally what you want for privacy, and it also strips GPS coordinates.
Is there a file size limit per image?
No artificial limit, but a 50 MP image decodes to roughly 200 MB of raw pixel data in memory. Very large batches on a low-RAM machine can tab-crash the browser.
Does resizing change the file format?
Only if you pick a format. With "Keep original" a JPEG stays a JPEG and a PNG stays a PNG. The extension in the ZIP matches the actual encoded content.
Need more than 20 at a time?
Bulk Image Kit is the same engine as a single offline file — unlimited images, resize + compress + watermark + rename, one-time $19, no subscription.
See Bulk Image Kit — $19Other tools
- Compress JPEG images without uploading them
- Convert JPG and PNG to WebP in bulk
- Resize images to 1920×1080 (Full HD)
- Resize images for Instagram — 1080×1080 and up
- Resize product photos for Shopify
- Resize listing photos for Etsy
- Resize photos for eBay listings
- Compress PNG files without uploading them
- Convert HEIC photos to JPG
- Watermark a whole batch of images
- Resize product photos for Amazon
- Resize images for WordPress
- Compress photos so they fit in an email
- Resize images for LinkedIn
- Compress an image to under 100KB
- All-in-one bulk image tool