Original 2.4 MBVerified output 100 KB
Private, browser-based image resizing
Increase image size in KB, exactly
Set an exact KB or MB target. Your image stays in this browser and is never uploaded.
Only the file size changes in this example.
Original file size2.4 MB
Exact output size100 KB
Pixel dimensions stay 1280 x 960
Set your target and add images
Private by designDrop images here or choose files
JPG, PNG or WebP. Up to 20 files, 20 MB each.
Real-world examples
The picture stays familiar. The file size becomes exact.
Photos, portraits and product shots can all be matched to a strict upload requirement. The final file is checked in bytes before download.
Original 1.8 MBVerified output 100 KB
Profile portrait
Original 960 KBVerified output 100 KB
Product image
Three steps, no upload
The controls are intentionally direct. Choose images, set the byte requirement, then download verified results.
Select
Add one JPG, PNG or WebP, or choose a batch of up to 20.
Set target
Choose exact, maximum or minimum size in KB or MB.
Download
Every result is decoded and checked again before download.
Why exact KB matters
Government forms, job portals, exams, identity documents and content systems often enforce rigid file limits. A valid image can still be rejected when its byte count falls outside the stated range. This tool changes the encoded file size without claiming to create new visual detail.
File size is not image dimensions
KB and MB measure stored bytes. Width and height measure pixels. An image can keep the same dimensions while its encoding changes, but a very small maximum may require dimension reduction. The result always reports both values.
Local processing is the privacy feature
The site does not need your image data to resize it. Files, names, previews and output blobs remain in browser memory. Optional analytics can record anonymous actions such as a completed batch, never file contents or file names.
Questions about exact image size
Are my images uploaded?
No. Processing happens in the current browser tab. The server does not receive image contents, file names or output files.
Does increasing KB improve image quality?
No. Adding encoded bytes does not create new visual detail. The purpose is to satisfy a file-size requirement, not to perform AI upscaling.
What does exact mean?
The downloaded Blob must contain exactly the target number of bytes. Targets use 1KB = 1024 bytes and are verified after processing.
What formats are supported?
JPG and JPEG, PNG and WebP are supported for input and output. GIF, SVG and HEIC are not supported in this version.
Will image dimensions change?
Increasing file size usually keeps the same dimensions. Reaching a small maximum may require fewer pixels, and the result shows both dimensions.
Does it work on mobile?
Yes in current Chrome, Edge, Firefox and Safari. Large batches may finish faster on a desktop because all processing uses local device memory.
Is metadata kept?
No by default. Re-encoding removes common EXIF metadata, which can include camera and location information.