Resize an image
Resize your photos one at a time or in a batch: width in pixels, a percentage, or a format imposed by a platform (square, story, banner) with automatic centred cropping. A phone photo is often 4 000 pixels wide, while a blog post shows 1 200; dividing the width by three divides the weight by nearly ten. The processing is local, so a photo you resize never leaves your machine.
- 100% local
- Free · no account
- Instant result
This tool runs entirely in your browser — nothing is sent to a server.
Resizing an image before publishing or sending it is the most effective gesture to reduce its weight: a smartphone photo is often 4,000 pixels wide, while a blog post only displays 1,200. Dividing the width by three divides the weight by nearly ten.
This tool resizes an image or a whole batch at once, in pixels, in percentage, or to the format imposed by a platform — square post, story, banner, thumbnail. When the requested proportions differ from the photo’s, it centre-crops rather than distorts. It applies progressive resampling — the image is downscaled in successive steps rather than all at once — which avoids the jagged, noisy look of a brutal reduction.
How it works
Type the figures or drop the file you want to process — the tool checks them as you go.
Everything is computed directly in your browser. Nothing is sent to a server.
The result appears instantly, with the detailed breakdown ready to copy, download or keep.
Why use this tool
No account, no download, no limit: the result appears as soon as you enter your data.
Every rule, algorithm and check reflects what we use ourselves every day at Flexina.
The calculations follow the official standards, and the step-by-step detail lets you double-check the outcome.
What does running it locally bring you?
Files, figures and documents never leave your device: nothing is stored, nothing is sent.
Once the page is loaded, you can cut the network: the tool keeps working.
No upload, no account, no third-party server in between: results stay fast and fully private.
Frequently asked questions
What width should I choose for a website?
1,920 pixels for a full-width banner, 1,280 pixels for an article illustration, 800 pixels for an image in a column. Beyond that, you make visitors download pixels they will never see.
How do I get an exact format without distorting the photo?
Choose the exact dimensions and leave the centre-crop option on: the tool takes the largest zone of your photo with the right format, then reduces it. You get the requested size pixel for pixel, without stretching. The “shrink to keep everything” option instead keeps the whole image, but the final format is then not guaranteed.
Can I process several images at once?
Yes, drop as many as you want: the same settings apply to all, the summary table shows the weight gain achieved for each, and a button launches all the downloads.
Can I enlarge an image?
Technically yes, but the tool warns you: enlarging adds no detail, it only stretches the existing pixels. The result looks blurry. Start from the full-resolution original file if you can.
Is the quality preserved?
Yes for a reduction: resampling in successive steps preserves sharpness much better than a direct reduction. The 100 % comparison button lets you judge the result pixel for pixel. Note that EXIF metadata is not kept in the output image — which is rather an advantage for your privacy.