Free Bulk Image Resizer: Exact Pixels, Every Time
Resize hundreds of images to exact pixel dimensions in one batch. Choose Fit, Fill and crop, or Stretch, keep the original format or convert it, and everything happens inside your browser. Nothing uploaded. Nothing stored.
Your images
0 images addedResize Your Images in 3 Steps
No account, no install, no queue. Drop your images in and the resized versions are ready to download.
- Step 1
Drop your images in
Drag files onto the page, click to browse, or drop in a ZIP and every supported image inside is pulled out. JPG, PNG, WebP, AVIF, HEIC, GIF and BMP all work, mixed together in the same batch.
- Step 2
Adjust if you want to
Enter the width and height you need. Open Settings to choose between Fit, Fill and crop, or Stretch, and to keep or change the output format.
- Step 3
Download your resized files
Conversion starts on its own, so there is usually nothing to press. Batches over 40 wait for one click so nothing runs away with your machine. Download files one at a time or take the whole batch as a single ZIP.
Three Ways to Hit Your Dimensions
Resizing is never just one operation. Different jobs need different geometry, so the resizer gives you all three and lets you pick per batch.
Fit Inside a Box
Scales the image down until the whole thing fits within your width and height, keeping the original proportions. Nothing is cropped and nothing is distorted, so the final dimensions may be smaller than the box on one axis. This is the right choice when the entire image has to stay visible. Product shots on a white background, logos, diagrams, screenshots.
Fill and Crop to Exact Size
Scales the image until it covers your width and height completely, then crops the overflow from the centre. Every output file lands at exactly the dimensions you asked for, which is what grid layouts, thumbnails, and social media templates need. Stretch is also available when you want the exact dimensions and do not care about proportions.
Every Control You Need. Nothing You Don't.
Most bulk resizers give you a width field and nothing else. Here is everything this one does.
True Bulk Resizing
Resize up to 150 images in a single batch, with a live progress bar and per-file status. Mixed formats are handled in the same pass.
100% Private & Secure
Every resize happens in your browser using canvas. Your images are never uploaded, so no one, including us, can see or store them.
Fit, Fill and Crop, or Stretch
Three geometry modes covering every common resizing job, selectable per batch in Settings.
Keep or Change the Format
Keep original preserves JPG, PNG, WebP, and AVIF. You can also convert while you resize. GIF, BMP, and HEIC sources land as WebP.
Enlargement Protection
By default the tool never scales an image above its native size, so nothing comes out soft. Turn on Allow enlargement when you actually want it.
ZIP Upload & Download
Drop in a ZIP and every supported image is extracted automatically. Download the resized batch back as one archive.
Batch File Renaming
Add a prefix, choose a separator, and set a starting number to rename an entire batch in sequence as it is resized.
Quality Control
A quality slider for JPG, WebP, and AVIF output, so a smaller image does not have to mean a needlessly large file.
Works on Every Device
Runs in any modern browser on Windows, macOS, Linux, ChromeOS, iPhone, iPad, and Android. Nothing to install.
How SmallerImages Compares
Here's how this resizer measures up against the typical online tool.
| Feature | SmallerImages | Typical Resizer |
|---|---|---|
| Bulk resizing (150 files) | Yes | No 10-20 file limit |
| Browser-based (no server uploads) | Yes | No Files uploaded to server |
| Fit, Fill and crop, and Stretch | Yes | Usually fit only |
| HEIC (iPhone) input support | Yes | No |
| AVIF input & output | Yes | No |
| Keep original format | Yes | No Forced to JPG or PNG |
| Enlargement protection | Yes | No |
| ZIP upload & download | Yes | No |
| Batch file renaming | Yes | No |
| Before/after comparison slider | Yes | No |
| 100% free. No signup, no limits | Yes | Freemium / ads |
| Ad-free experience | Yes | No |
When You Need to Resize in Bulk
Whether you are preparing a product catalogue, normalising a photo library, or hitting a platform spec, resizing in bulk saves hours.
E-commerce Product Catalogues
Every storefront wants product images at one consistent size. Fill and crop gives you a uniform grid from source photos that were never shot to the same ratio.
Website & Page Speed
Serving a 4000px photo in a 800px slot wastes bandwidth on every visit. Resizing to the real display size is the single biggest image performance win available.
Social Media & Ad Creatives
Each platform has its own required dimensions. Resize one source batch into the exact spec for each placement in a couple of passes.
iPhone Photo Libraries
HEIC photos come off an iPhone at full sensor resolution. Resize and convert them in one step, with the HEIC decoder built in.
CMS & Email Uploads
Many platforms reject oversized images or silently recompress them badly. Resize first and you control the result instead of their pipeline.
Design & Documentation Assets
Normalise screenshots, diagrams, and reference images to one width so documentation and design files stay visually consistent.
What People Say About Bulk Resizing
Real feedback from people resizing images in bulk: catalogue teams, designers, developers, and photographers.
Resized 200 product shots to exactly 1200x1200 in a single batch. Every one came out identical, which is what a catalogue needs.
Fit mode keeps the whole image visible, which is what I need for logos and diagrams. Having all three modes in one tool is rare.
Resized a folder of iPhone HEIC photos straight to web-sized WebP. Two problems solved in one step.
Batch renaming while resizing means files land in our CMS correctly named. One less manual step.
No upload means no waiting and no privacy conversation. Everything happens locally.
We used Photoshop for batch resizing. This does the same job in the browser with no licence to manage.
Works on any browser, including the locked-down machine at work. No install needed.
Our stock library arrives as archives. I resize straight from the ZIP without unpacking anything.
Our marketplace rejects oversized uploads. Now everything is pre-sized and nothing bounces.
Our photographer shoots at full sensor resolution and I need web sizes. One batch, done, instead of an afternoon in Photoshop actions.
The enlargement protection is a thoughtful default. It will not upscale unless I explicitly ask, so nothing comes out soft by accident.
Resized a folder of iPhone HEIC photos straight to web-sized WebP. Two problems solved in one step.
Bulk Image Resizing and the Three Ways to Do It
Fit, fill and crop, and stretch produce very different results. Here is which one each job wants.
Resizing sounds like one operation and is really three, which is why so many tools get it wrong. Fit scales the whole image down until it sits inside the box you specified. Nothing is cropped and nothing is distorted, but one dimension usually ends up smaller than you asked for. That is the right behaviour for logos, diagrams, screenshots and product shots on white, where losing an edge would ruin the image.
Fill and crop covers the box completely and trims the overflow from the centre. Every output lands at exactly the dimensions you asked for, which is what a thumbnail grid or a social template needs. Stretch forces the exact dimensions without preserving proportions, which distorts the picture and is almost never what you want, but it is there for the cases where it is.
Enlargement is off by default. Scaling a 600 pixel image up to 1600 pixels does not add detail, it just adds soft pixels, so the tool refuses unless you explicitly ask. You can turn it on in Settings when you genuinely need a larger canvas.
Format is a separate decision from size. Keep original preserves JPG, PNG, WebP and AVIF exactly as they arrived. GIF, BMP and HEIC sources are saved as WebP, because browsers cannot write those formats back out. You can also convert while you resize, which turns two passes into one.
All Formats. One Tool.
Every conversion path has its own page with defaults already set for that pair. The tool behind all of them is the same one you have been using: it accepts JPG, PNG, WebP, AVIF, HEIC, GIF and BMP, reads ZIP archives, and handles up to 500 images in a single batch.
Conversion runs in your browser using your own processor, so nothing is uploaded, nothing is queued behind other people, and there is no account, no watermark and no daily cap. Close the tab and the files are gone from memory; they were never anywhere else.
If you need a smaller file rather than a different format, the image compressor keeps your originals and works to a quality level or a size in kilobytes. To change dimensions, the image resizer handles fit, fill and crop, or stretch across a whole folder at once.
Frequently Asked Questions
Quick answers about bulk image resizing.
Is it safe to resize images on SmallerImages?
What is the difference between Fit, Fill and crop, and Stretch?
How many images can I resize at once?
Can I make an image larger than the original?
Will resizing change my file format?
Can I resize iPhone HEIC photos?
What if I only enter a width?
Can I rename files while resizing?
Is SmallerImages completely free?
Do I need to install any software?
Exact Dimensions, Without the Upload
Every other bulk resizer sends your files to their servers first. SmallerImages keeps them on your device and resizes hundreds of images in seconds, for free, with zero compromises.
Resize Images Now