Free Image Resizer
Resize Any Image to Exact Pixels. Compress It in the Same Step. Nothing Uploaded.
Set width, height, or both. Lock aspect ratio. Choose output format. Compress. Download. All in your browser - or batch-process folders with the desktop app.
100% Private
Zero cloud uploads
True Color Fidelity
Original colors stay vibrant
Instant Speed
Fast in-browser processing
Free Online
No file limits
Drag & Drop Files Here
or click to browse from your device
Accepted: image/*
Tool Options
Resize photos for Instagram, LinkedIn, email, and the web. Pick a preset or enter exact pixels—batch-ready, private, and free.
Why Resize and Compress Together
Exact Pixel Dimensions
Social media has specific image size requirements.
LinkedIn posts: 1200x627px.
Instagram: 1080x1080px.
Twitter/X: 1200x675px.
FastCompressor resizes to exact pixel targets - not approximate 'small/medium/large' options.
Aspect Ratio Lock
Resize to a specific width and FastCompressor automatically calculates the correct height to maintain your image's original proportions.
Or set both dimensions for exact cropping.
Batch Resize Entire Folders
E-commerce teams don't resize one product image.
They resize 200.
FastCompressor's desktop app batch-resizes entire folders to a consistent specification.
Resize Then Compress in One Step
Resizing before compressing is more efficient than compressing then resizing - fewer pixels means less data to compress.
FastCompressor does both in sequence automatically.
How to compress Image Resizer files
Instant, private compression in three quick steps.
Select Files
Drag and drop your Image Resizer files into the browser or click Browse.
Choose Quality
Pick Balanced (recommended), Lossless, or Maximum compression presets.
Instant Download
Save files individually or download all converted files in a single ZIP archive.
Built for professionals who need speed, privacy, and quality.
Resizing photos for exact social media dimensions (Instagram, LinkedIn, Twitter/X)
Preparing e-commerce product images to consistent dimensions before upload
Resizing screenshots for documentation, blog posts, and tutorials
Creating thumbnails at specific sizes for CMS or video platforms
Batch-resizing photography portfolios for web delivery
How We Compare
Why privacy-focused professionals choose FastCompressor
| Feature | FastCompressor | Typical Online Tool |
|---|---|---|
| Exact pixel control | Yes - width + height | Presets only |
| Aspect ratio lock | Yes | Sometimes |
| Batch folder resize | Unlimited (Pro) | 1-20 files |
| Format conversion | Yes - JPG/PNG/WebP | Limited |
| No upload | Yes | No |
| Price | $19 once | $5-79/month |
Why use FastCompressor Desktop for free image resizer?
Online tools are great for quick, single-image edits. But when you need to process hundreds of files or maintain strict privacy, native software is the only way to go.
Free Image Resizer
Why image resizing matters more than most developers think
Serving an image at 400x300 pixels that's actually 4000x3000 pixels forces the browser to download 10x more data than it needs, then scale it down visually. This wastes bandwidth, slows page load, and directly impacts your Core Web Vitals "Largest Contentful Paint" score.
Google's Lighthouse flags "Properly size images" as one of its top performance recommendations - and it specifically checks whether images are served at the size they're displayed. A hero image displayed at 1200px wide but uploaded at 4000px wide is a Lighthouse error.
FastCompressor's image resizer handles this properly:
Pixel-perfect resizing - Set exact output dimensions. Aspect ratio lock prevents distortion. Useful for e-commerce product images with required dimensions (Shopify: 2048x2048, Amazon: 1000x1000 minimum).
Percentage resizing - Reduce to 50%, 25%, or any percentage. Useful for quickly creating thumbnail versions of existing images.
Maximum dimension resizing - Set a maximum width or height. The resizer scales down proportionally without cropping. Useful for standardising a folder of images to a consistent maximum size.
All resizing happens in your browser. The output is available immediately as a download. For batch resizing - entire product photo libraries, press kit images, or social media asset sets - use the FastCompressor desktop app.
Frequently Asked Questions
Common questions about in-browser Image Resizer optimization.
Batch Resize Images Privately - $19 Once
Exact pixels · Aspect ratio lock · Batch folders · No uploads · 30-day guarantee