Image Resizer – Free Online Batch Image Resize Tool
Resize multiple images at once with our free online image resizer. Set exact dimensions, lock aspect ratio, scale by percentage, or constrain width – all with batch processing. Export as JPEG, PNG, WebP, or AVIF with quality control. No upload, no signup, no limits.
🖼️ Core Resize Features
| Feature | Description |
|---|---|
| Width / Height Resize | Manually set exact dimensions in pixels. |
| Aspect Ratio Lock | Keep proportions locked; changing width automatically adjusts height (and vice versa). |
| Percentage Resize | Scale images by any percentage (1–500%). |
| Max Width Resize | Constrain only the width; height scales proportionally – perfect for responsive web images. |
| Batch Resize | Upload multiple images and resize them all at once with the same settings. |
🎨 Output & Quality Control
| Feature | Description |
|---|---|
| Multiple Format Export | Save resized images as JPEG, PNG, WebP, or AVIF. |
| Quality Control | Adjust JPEG/WebP/AVIF quality from 10% to 100% with a live slider. |
| ZIP Download | Download all resized images as a single ZIP file (batch processing). |
| Individual Download | Download any single resized image from the batch list. |
👁️ Preview & Comparison
- Before / After Comparison – Drag the slider to compare the original and resized image side‑by‑side.
- Live Preview – See the resized image instantly after processing.
- Batch List – View all uploaded images with thumbnails, file sizes, and processing status.
- File Size Statistics – Original size, resized size, and total processed count.
🛠️ User Experience
- Drag & drop upload – Drop multiple images at once.
- Click to browse – Select images from your device.
- Dark / Light mode – Toggleable theme that persists in localStorage.
- Toast notifications – Instant feedback for all actions.
- Fully responsive – Works on desktop, tablet, and mobile devices.
- Reset settings – Restore all controls to default values.
🔒 Privacy & Security
- 100% browser‑based – All processing happens locally using the Canvas API. No images are uploaded to any server.
- No external APIs – No API keys, no third‑party services, no hidden costs.
- Unlimited usage – Resize as many images as you want, completely free.
- No signup required – Use the tool immediately without registration.
Why Use Our Image Resizer?
Resizing images is essential for web optimization, social media, email attachments, and print. Our tool gives you total control:
- Batch processing – resize dozens of images at once, saving hours of manual work.
- Aspect ratio lock – never stretch or squash your images again.
- Flexible sizing – exact pixels, percentage scale, or max width constraints.
- Modern formats – export as JPEG, PNG, WebP, or AVIF for next‑gen compression.
- ZIP download – get all resized images in one convenient archive.
Whether you’re a web developer preparing images for a client site, a designer creating social media assets, or a blogger optimizing images for faster loading, this tool delivers professional results in seconds. And because everything runs in your browser, your images stay private and secure.
Who Can Benefit from This Tool?
- Web developers – resize images for responsive web design and optimal loading.
- E‑commerce owners – standardize product images for your online store.
- Social media managers – resize images for Instagram, Facebook, Twitter, LinkedIn.
- Photographers – batch resize photo galleries for client previews.
- Bloggers & content creators – optimize featured images and in‑post visuals.
- Digital marketers – create ad creatives at the right dimensions.
- Students & teachers – resize images for presentations or assignments.
How to Resize Images Online (Step by Step)
- Upload your images – drag & drop or click to browse (multiple files supported).
- Adjust resize settings – set width, height, percentage, or enable max width mode.
- Choose output format – JPEG, PNG, WebP, or AVIF.
- Adjust quality (optional) – use the slider from 10% to 100%.
- Click “Resize All” – all images are processed in batch instantly.
- Preview any image – click the eye icon in the batch list to see before/after comparison.
- Download – download individual images or the entire batch as a ZIP file.
🛠️ More Free Tools You May Need
❓ Frequently Asked Questions
Can I resize multiple images at once?
Yes – batch resize is fully supported. Upload as many images as you like and process them all with the same settings.
What image formats can I export to?
You can export to JPEG, PNG, WebP, or AVIF. Quality control is available for JPEG, WebP, and AVIF.
Will my images be uploaded to a server?
No. All processing happens locally in your browser using the Canvas API. Your images never leave your device.
Can I download all resized images as a ZIP file?
Yes – after processing, click “Download ZIP” to get all resized images in one convenient archive.
What is the maximum file size I can upload?
The tool supports images up to 20 MB per file. Multiple files can be uploaded as long as total memory allows.
Does the tool preserve image quality?
You control the quality with the slider (10‑100%). For PNG, quality is lossless. For JPEG, WebP, and AVIF, you can balance size vs. quality.
Is there a limit on how many images I can process?
No – completely unlimited. Process as many images as you need, as often as you want.
🌟 About OnlineFreeConverters
We build free, privacy‑first tools that work 100% in your browser. No uploads, no signups, no tracking. Every tool is designed to be fast, reliable, and easy to use. Built by CodePress Academy – empowering developers and creators with practical web solutions.
Ready to Resize Your Images?
Upload your images above, choose your settings, and download your resized files – batch processing makes it fast and easy!
🔒 100% private · ♾️ Unlimited · ⚡ Batch processing · 📦 ZIP download
Disclaimer: This tool is for informational and personal use. All processing is client‑side; no server involvement. Results may vary based on input image complexity.