Image Resizer.
Resize bulk images to custom dimensions in your browser. Fully local and private.
Drag & drop your images here, or browse files
Supports JPEG, PNG, WebP, GIF, SVG. Bulk processing supported.
Selected Images (0)
Settings
Preserves aspect ratio, adding empty bars to fit inside dimensions.
Output
Your browser will automatically download the resized file(s).
How to Use Our Client-Side Image Resizer Without Quality Loss
Need to make your files smaller for web performance or application forms? Our high-performance image resizer is optimized to reduce image size directly inside your browser window. By utilizing modern client-side Canvas rendering, you can resize image online in real time. We don't upload your images to remote servers, meaning this is the most secure and private online image resizer available.
Precision Controls: Resize Image in Pixels
When building website layouts, precision is crucial. Our online image resizer allows you to resize image in pixels (px) with ease. Simply choose the pixel mode, input your desired width or height, and let the system handle the scaling.
If you want to maintain the correct aspect ratio, click the lock icon to lock the dimensions. Changing the width will automatically recalculate the height. If you need to stretch, fit, or crop the image into a specific box layout, select our advanced aspect ratio fit modes (Stretch, Fit, or Crop) to control how the canvas renders your graphics.
Niche Resizing: Resize Photo for Passport & Signatures
Government forms and registration portals often demand strict dimensions. For instance, when applying for visas or official exams, you may need to resize image for passport specifications (typically 3.5 x 4.5 cm converted to pixels) or resize signature online limits (often 140 x 60 pixels).
With Compy Image, you can upload your scanned signatures, input the exact pixel parameters, and select the output format. You can also crop and resize image coordinates to ensure your face is perfectly centered. Since no files are sent to a server, this is the most secure method to optimize identity documents.
Instant Local Photo Scale: How to Resize Photo Files in Batch
Need to scale multiple files? Our batch processing engine is built for bulk tasks. You can select several images at once, configure global pixel values, and click the button to trigger individual downloads. The system processes each file in parallel using HTML5 canvas buffers, scaling files in milliseconds. Whether you need to optimize high-resolution JPEGs, PNG graphics, or modern WebP formats, Compy Image delivers developer-grade performance with absolute privacy.
Frequently Asked Questions
How do I resize an image without losing aspect ratio?
Click the lock aspect ratio toggle button next to the width and height inputs. When active, changing either the width or height will automatically compute the corresponding dimension, preventing any visual distortion.
Can I resize bulk photos for passport and visa forms?
Yes, our tool supports batch uploading. Drag in multiple scanned photos, select your target pixel sizes (e.g. 350x450px for passport forms), and the tool will scale and download them sequentially.
What is the difference between pixel resizing and percentage resizing?
Pixel resizing allows you to specify the exact dimensions (width & height in px) for your output image. Percentage resizing scales the file size relative to its current canvas bounds (e.g., setting it to 50% cuts the width and height in half).