Image Resizer
Resize images by percentage or exact dimensions. Convert to any format. Compress for the web. Free, private, no signup required.
Resize Your Image
Drop your image here or click to browse
JPG · PNG · GIF · BMP · TIFF · WEBP · HEIC | Max 10 MB
How to Use the Image Resizer
Upload your image
Drag and drop a file onto the upload zone or click it to open your file browser. Accepted formats are JPG, PNG, GIF, BMP, TIFF, WEBP, and HEIC. Files must be under 10 MB. Your image is sent to the server only when you click Preview or Process — nothing is stored once the operation completes.
Choose a resize method
By Percentage scales relative to the original — 50 halves both dimensions, 200 doubles them. Custom Dimensions lets you enter exact pixel values for width and/or height. With "Maintain aspect ratio" on, entering only one dimension calculates the other automatically so your image is never distorted.
Pick an output format
Select your output format from the format grid — PNG, JPG, WEBP, GIF, BMP, or TIFF. You can resize and convert format in a single step. Enable Optimize for web to apply extra compression suited for websites. Enable Preserve EXIF metadata to keep camera data (model, GPS, date) in the output file.
Preview the result
Click Preview to see the original and resized images side by side with exact dimensions and estimated file size. The size change is shown in green when the file is smaller and red when it is larger, so you can adjust settings before downloading.
Process and download
Click Process & Download to apply all settings and save the resized file to your device. The filename includes a timestamp so it does not overwrite your original. Click Reset at any time to clear everything and start fresh.
What We Offer
100% Private
Images are processed in memory and discarded immediately after download. Nothing is stored on our servers between sessions.
Instant Processing
Server-side processing delivers your resized image in seconds regardless of the original file size or complexity of the operation.
Lanczos Resampling
We use the Lanczos algorithm — the gold standard for image scaling — to preserve sharpness and fine detail, especially when downscaling.
Format Conversion
Convert between PNG, JPG, WEBP, GIF, BMP, and TIFF in one step — resize and change format at the same time without extra tools.
Web Optimisation
Optional extra compression tuned for web delivery reduces file size without visible quality loss for faster-loading pages.
Completely Free
No account, no watermarks, no file limits. All features — format conversion, web optimisation, EXIF preservation — are free for everyone.
Output Format Guide
Choosing the right format for your use case affects both quality and file size. Here is what each option actually does.
| Format | Best for | Transparency | Notes |
|---|---|---|---|
| PNG | Logos, screenshots, text graphics | Yes | Lossless — no quality loss on save. Files are larger than JPG for photos. |
| JPG | Photographs, complex natural images | No | Lossy — small files. Avoid re-saving the same JPG repeatedly as quality degrades each time. |
| WEBP | Web images where file size matters | Yes | Typically 25–35% smaller than JPG at similar quality. Supported in all modern browsers. |
| GIF | Simple flat-colour graphics | Yes (1-bit) | Limited to 256 colours — not suitable for photographs. |
| BMP | Windows legacy compatibility | No | Uncompressed — very large files. Only use when a specific application requires it. |
| TIFF | Print and archival work | Yes | High quality, large files. Preferred by print shops and professional photography workflows. |
Quick recommendation
For website images use WEBP with "Optimize for web" enabled — it gives the smallest file size for any modern browser. For images with a transparent background use PNG or WEBP. For photographs going to print use TIFF and keep "Preserve EXIF metadata" on so your printing software can read the DPI. For everything else JPG is a safe default.
Tips for Better Results
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Downscaling always looks better than upscaling. When you make an image smaller the tool discards pixels it does not need. When you enlarge it, the tool must invent pixels that never existed — which causes blurring. Start from the largest original you have.
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Keep "Maintain aspect ratio" on unless you specifically want distortion. Entering mismatched width and height stretches the image horizontally or vertically and usually looks wrong.
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Use "Optimize for web" with WEBP or JPG for the smallest output files. Together they are ideal for web pages. Skip this option if you are preparing images for print or archival storage where maximum quality matters.
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Never resize and re-save a JPG multiple times. Each re-save applies lossy compression again, so quality degrades with every cycle. Keep a PNG or TIFF master and export to JPG only for the final delivery version.
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For A4 print at 300 DPI you need at least 2480 × 3508 px. Upscaling a small image to this size will not create the missing detail — you need a higher-resolution original to begin with.
Frequently Asked Questions
What file formats and sizes can I upload?
You can upload JPG, PNG, GIF, BMP, TIFF, WEBP, and HEIC files up to 10 MB. The tool checks both the format and the size when you select a file and shows an error immediately if either is outside the accepted range.
Is my image stored on your servers?
No. Your image is held in memory only for the duration of the resize operation and is discarded immediately after the resized file is sent back to your browser. We do not log, store, or share uploaded images.
Can I make an image larger?
Yes — enter a percentage above 100 or dimensions larger than the original. The resizer scales the image up using Lanczos resampling, which is the best general-purpose algorithm for this. That said, upscaling cannot recover detail that was not in the original, so very large upscales will still look soft.
If I only enter width, what happens to the height?
When "Maintain aspect ratio" is on and you provide only a width (or only a height), the server calculates the missing dimension automatically so the proportions of the original are preserved exactly. You get a precisely sized image without any stretching or squashing.
What is EXIF data and should I preserve it?
EXIF is metadata embedded inside JPEG and TIFF files by the camera or phone that took the photo. It records the device model, lens settings, shutter speed, ISO, date, time, and GPS coordinates. Turn "Preserve EXIF metadata" on to keep that information in the resized file — useful for photographers and archivists. Turn it off if you are sharing images publicly and do not want location data included.
What does "Optimize for web" actually do?
"Optimize for web" applies format-specific compression tuning aimed at reducing file size for use on websites. For JPG this means optimised Huffman coding and chroma subsampling. For WEBP it enables best-effort lossy compression. The output looks essentially the same on screen but can be noticeably smaller. Do not use it for images destined for print or archival storage.
Can I convert format without resizing?
Yes. Set the percentage to 100 so the dimensions stay the same, then choose a different output format in the format grid. The tool re-encodes the image in the new format without changing its dimensions, acting as a format converter.
Is this tool completely free?
Yes, completely free. There are no watermarks added to output images, no account or sign-up required, and no limits on how many images you can process. All features — format conversion, web optimisation, and EXIF preservation — are available to everyone at no cost.