Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
Image Resizer
- Home
- Utility
- Image Resizer
Resize images directly in your browser. Your files are never uploaded to any server — everything runs locally.
Drop image here
or click to browse
Supports JPEG, PNG, WebP • Max 20MB
What is an Image Resizer?
An image resizer is a tool that changes the dimensions (width and height) of an image. It works by resampling the pixels to produce a new image at the specified size. This is useful for preparing images for websites, social media, email, or any platform that requires specific image dimensions.
This tool runs entirely in your browser using the Canvas API and the browser-image-compression library. Your files never leave your device — they are not uploaded to any server, stored, or logged.
How to Use This Image Resizer
- Upload an image — Drag and drop a JPEG, PNG, or WebP image onto the drop zone, or click to browse and select a file (max 20MB).
- Set dimensions — Enter the desired width and height in pixels. Enable Maintain aspect ratio to keep the original proportions.
- Choose format & quality — Select the output format (JPEG, PNG, or WebP) and adjust the quality level using the slider.
- Click Resize — Press the Resize Image button to start processing. The progress bar shows real-time status.
- Download the result — Once complete, review the new dimensions and file size, then click Download Resized Image to save.
Frequently Asked Questions
Is this image resizer safe to use?
Yes. All processing happens entirely in your browser using JavaScript. Your image is never uploaded to any server, stored in any database, or logged. Once you close or refresh the page, no trace of your image remains.
What image formats are supported?
You can upload JPEG, PNG, and WebP images. The output can also be saved as JPEG, PNG, or WebP, allowing you to convert between formats while resizing.
What is the maximum file size?
The tool supports images up to 20MB. For best results, keep files under 10MB as very large images require more browser memory.
Will resizing affect image quality?
Resizing to smaller dimensions may reduce perceived sharpness. Use the quality slider (higher = better quality, larger file) to balance quality and file size. PNG format is lossless but produces larger files than JPEG or WebP.
Last updated: 17 Aug 2026
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