Resize Image Online — Free & Fast
Resize images online for free. Change dimensions in pixels or percentage. Supports JPG, PNG, WebP.
Resize any image to exact pixel dimensions — completely free, no signup required. PDFFlare processes everything in your browser so your files never leave your device. Whether you need a square Instagram profile photo, a website thumbnail, or an email signature image at a specific size, just upload, set your dimensions, and download.
Need to maintain aspect ratio? Lock the proportions and enter only one dimension — the other adjusts automatically. For best results, pair resizing with image compression to keep file sizes small, or use the crop tool to remove unwanted areas before resizing.
Drop your image here
JPG, PNG, or WebP up to 50 MB
How to Resize Images
Upload your image
Click the upload area or drag and drop an image file. JPG, PNG, and WebP formats are supported.
Set the new dimensions
Enter the desired width and height in pixels. Toggle 'Maintain aspect ratio' to keep proportions locked.
Download the resized image
Click 'Resize Image' to process. Preview the result and download your resized image instantly.
When Do You Need to Resize an Image?
Social media profile pictures. Platforms like Instagram, Facebook, and LinkedIn require specific pixel dimensions for profile photos. Uploading the wrong size results in awkward cropping or blurry scaling. Resize to the exact dimensions before uploading for a sharp, professional look.
Website thumbnails and banners. Oversized images slow down page load times and hurt SEO rankings. Resize hero images, blog thumbnails, and banner graphics to the exact pixel size your layout requires so pages load fast on every device.
Email signature images. Most email clients display signature images at a fixed size. If you upload a large photo, it may appear distorted or get blocked entirely. Resize your logo or headshot to around 300×100 pixels for reliable rendering across Gmail, Outlook, and Apple Mail.
Passport and ID photo requirements. Government portals and visa applications often specify exact pixel dimensions and file-size limits. Use this tool to resize your photo to the required measurements before submitting your application.
Why Use PDFFlare to Resize Images?
100% Browser-Based
Your images never leave your computer. Everything runs in your browser using the Canvas API — no server uploads needed.
Maintain Aspect Ratio
Lock the aspect ratio to prevent distortion. Change one dimension and the other adjusts automatically.
Multiple Format Support
Resize JPG, PNG, and WebP images. The output format matches your input for maximum compatibility.
No Signup Required
Start resizing immediately — no account, no email, no watermarks. Just drop your image and go.