FJ Techtools provides a free image resize online tool that lets you change the dimensions of any JPG or PNG image directly in your browser — no software installation required, no signup, and no file size limits. Whether you need to resize a photo for a website, shrink an image for an email attachment, or scale down a screenshot for a blog post, this tool handles it in seconds.
You can resize by percentage (e.g. scale to 50% of the original size) or by entering exact pixel dimensions for width and height. The aspect ratio lock ensures your image never gets stretched or distorted — unlock it only when you need non-proportional resizing.
Click "Select Image" or drag and drop your JPG or PNG into the upload area. The image loads instantly in your browser — nothing is sent to any server.
Choose to resize by percentage or by exact pixel dimensions. Toggle the lock icon to maintain or break the aspect ratio, then click "Resize Image".
Click "Download Image" to save your resized image. The file downloads directly to your device — ready to use immediately.
Image resizing is one of the most common tasks in everyday digital work. Here are the most frequent use cases:
Resize by percentage is the easiest option when you want to make an image generally smaller or larger without worrying about exact pixel values. Entering 50% halves both the width and height. This is ideal for quick size reductions.
Resize by dimensions gives you precise control. Enter the exact width or height in pixels and the tool calculates the other dimension automatically (when aspect ratio lock is on). Use this when a platform specifies exact pixel requirements — for example, a 1200×630px Open Graph image or a 800×800px product thumbnail.
This tool supports the most widely used raster image formats: JPG/JPEG and PNG. Both formats are supported for upload and the resized image downloads in the same format as the original.
