Image Tools
Image Resizer
Set exact pixels, scale by percent, hit a target file size, or pick a platform preset. Processes up to 20 images at once, entirely in your browser.
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Your file never leaves your device. Processed entirely in your browser.
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Why FileReadyNow
Resize Images to Exact Dimensions Without Installing Software
Set width, height, or percentage scale and get a resized image in seconds, all inside your browser.
Resize by Pixels or Percentage
Enter exact pixel dimensions or a percentage scale to resize your image precisely for any platform or use case.
Aspect Ratio Lock
Lock the aspect ratio so the image scales proportionally when you change one dimension, preventing distortion.
Batch Resizing
Resize multiple images to the same dimensions at once rather than processing each file individually.
JPG and PNG Output
Download the resized image in JPG or PNG format depending on whether you need a smaller file or a lossless result.
No Upload to Server
All resizing happens in your browser. Your images are never transmitted to or stored on any external server.
No Account Required
Upload your image, set your dimensions, and download the result. No signup, no watermark, no limits.
Say you have one photo that needs to be 1080×1080 for Instagram, 1200×627 for LinkedIn, and under 1 MB for email. Most tools make you do that in three separate passes. This one handles all of it in a single session: upload once, export each version.
Four Ways to Set Your Size
The tool offers four distinct resize modes so you can match the right approach to what you actually need:
- Pixels: type exact width and height values. Aspect ratio lock is on by default so changing one dimension updates the other automatically, preventing distortion.
- Percent: scale everything proportionally. Set 50% and every uploaded image comes out at half its original dimensions. Useful for batch jobs where relative size matters more than a specific pixel count.
- File Size: set a target in KB or MB and the tool finds the right quality setting automatically. It runs up to 12 iterations, narrowing in until the output lands within 5% of your target. Useful when a portal or inbox has a hard upload cap.
- Presets: 14 platform-specific dimensions ready to pick: Instagram Square (1080×1080), Story/TikTok (1080×1920), Facebook/OG (1200×628), LinkedIn Post (1200×627), Twitter Header (1500×500), YouTube Thumbnail (1280×720), YouTube Channel Art (2560×1440), Pinterest (1000×1500), WhatsApp DP (800×800), Print 2K (2048×2048), Avatar (400×400), Thumbnail (128×128), Full HD (1920×1080), HD 720p (1280×720).
What Happens to Quality When You Resize
Downsizing (making an image smaller) almost always looks clean. You're removing pixels the screen wasn't showing in detail anyway, so sharpness holds up well. Upsizing is the opposite: the tool uses canvas interpolation to fill in new pixels, but it can't recover detail that wasn't captured in the original. Large upscales will look soft.
For JPG and WEBP output, a quality slider (0 to 100) lets you trade file size against sharpness. PNG is always lossless, no quality loss regardless of the slider, but the file can still get smaller just from having fewer pixels. GIF resizes but loses animation in the process; the first frame is used.
Formats accepted: JPG, PNG, WEBP, GIF. BMP and TIFF are not supported.
When the File Size Mode Actually Matters
Most resizing is about dimensions. File Size mode is for the cases where the constraint is the byte count itself:
- HR portals and application forms: many cap photo uploads at 2 to 5 MB. The exact pixel size doesn't matter as long as you're under the limit.
- Business email attachment limits: Gmail allows 25 MB, but many corporate mail servers and hosted inboxes set a lower cap, often 10 MB or less. Hitting a target size avoids the bounce.
- CMS upload limits: WordPress defaults to 64 MB but shared hosts frequently cap it at 8 to 32 MB. Knowing the exact output size before you upload saves the error and retry loop.
- Mobile app attachments: messaging and field-service apps often warn or block files above a threshold. Setting a target in the tool means the attachment goes through on the first try.
Step by Step
How to Use the Image Resizer
Upload your image by selecting the file from your device or dragging and dropping it.
Choose your dimensions or percentage by entering a custom width and height or scaling by percentage.
Enable the aspect ratio lock (optional) to prevent stretching or distortion.
Adjust quality settings to fine-tune compression if needed.
Click 'Resize' and the tool will process your image instantly.
Download your resized image and save the optimized file to your device.
Frequently Asked Questions
Both tools serve similar purposes, but they cater to slightly different audiences. Canva offers a design-focused environment with templates and editing features, while FileReadyNow’s Image Resizer is more streamlined and efficient for quick resizing tasks. If your goal is speed, simplicity, and maintaining quality without extra design steps, this tool is a strong alternative.
You can resize an image on an iPhone by using built-in apps or online tools like this one. Simply upload your image through your mobile browser, select the desired dimensions, and download the resized version. This avoids installing additional apps and provides more control over output quality.
Yes, absolutely. The tool is perfect for resizing images to fit Instagram’s recommended dimensions, such as square (1:1), portrait (4:5), or story size (9:16). It ensures your photos look sharp and properly aligned without cropping important details.
When done improperly, yes—but this tool is specifically designed to resize image without losing quality. It uses optimized algorithms to minimize any visible loss, especially when resizing within reasonable limits.
Most standard image sizes are supported. Extremely large files may take slightly longer to process, but the tool is optimized for efficiency and handles high-resolution images smoothly.