Image DPI Converter
Change the DPI saved in your images — 72, 150, 300, 600 or any other common value — while every pixel stays exactly as it is. Convert one file or a whole batch. Everything runs in your browser — nothing is uploaded. Need a smaller file instead? Compress or convert.
Drag the preview to choose which part of the image is kept. The same framing is used for every image in the batch.
How to resize an image
Resizing changes the pixel dimensions of an image — making it fit a specific width, a percentage of the original, or a platform's required size. Smaller dimensions also mean a smaller file, which is why resizing is one of the most effective ways to speed up a page.
- Add your images, or drop them in.
- Choose By dimensions for an exact width and height, By percentage to scale, or a Preset for common social and screen sizes.
- Click Resize, then download each file or grab them all as a ZIP.
Exact or proportional
Set precise pixels with aspect-ratio lock, scale by percentage, or pick a preset. Whatever the target needs.
Batch, instantly
Resize a whole folder at once to the same dimensions. No upload wait, no queue, no file limit.
Nothing is uploaded
Your images are resized by your own browser and never sent to a server, so they stay completely private.
Resize for a specific platform
Jump to a common size:
Other image tools:
Will resizing reduce quality?
Making an image smaller is safe — you are discarding pixels you no longer need, and the result looks clean. Making an image larger than its original is where quality suffers, because the browser has to invent pixels that were never there, which looks soft or blocky.
As a rule: resize down freely, but avoid scaling up much beyond the original dimensions. If you need a smaller file rather than smaller dimensions, use the compressor instead.
Square sizes
Same width and height — profile photos, icons, product shots:
Landscape sizes
Wider than tall — screens, banners, covers and thumbnails:
Portrait sizes
Taller than wide — passport photos, forms and phone screens:
Change the aspect ratio
Paper, print & photo sizes
Paper and photo sizes in mm, cm and inches, plus DPI tools:
Resize for a platform
Ready-made sizes for social profiles and posts:
Resize tools
Batch resizing, DPI and crop tools:
What changing DPI really changes
DPI is a label, not detail. A 3000×2000-pixel photo has the same pixels whether it says 72 DPI or 300 DPI. The number only tells printers and layout programs how big to print it: 3000 pixels at 300 DPI is 10 inches; at 72 DPI the same file claims to be 41.7 inches.
How this page works. It opens on By percentage at 100%, so the pixels are untouched, with Set DPI to on 300. Pick another value — 72, 96, 150, 200, 300, 400 or 600 — click Resize, and the new DPI is written into each file.
When someone asks for "300 DPI". Print shops and publishers usually mean "enough pixels to print sharply at this size". Check first: width in pixels ÷ 300 = largest sharp print width in inches. If that's big enough, changing the label is all you need. If not, no DPI setting can add the missing detail.
Which value to choose: 300 for photo prints and magazines, 150–200 for posters seen from a distance, 72 or 96 for screens (where DPI is ignored anyway), 600 for line art and scans of text.
Not sure what your file says now? Check it with the image DPI checker first.
DPI presets and print tools
Jump straight to a fixed DPI, or size an image for print:
Frequently asked questions
Does changing DPI reduce image quality?
Not in pixels — at 100% size the width and height stay the same, and only the DPI value saved in the file changes. JPGs are saved again, so use a high quality setting to keep them identical to the eye.
What is the difference between resizing and compressing?
Resizing changes the dimensions (the width and height in pixels). Compressing keeps the dimensions but reduces the file size by lowering quality. Resizing down does both at once, which is why it is so effective. For file size alone, use the compressor.
Will the aspect ratio be kept?
In dimensions mode, tick "Keep aspect ratio" and set just the width or height — the other is calculated automatically so the image is not stretched. Untick it to force exact dimensions, which may distort the image.
Can I resize many images at once?
Yes. Drop in as many as you like and they are all resized to the same setting in one go, then you can download them together as a ZIP. There is no limit on how many.
Are my images uploaded?
No. Resizing happens entirely in your browser. Nothing is transmitted or stored, and you can disconnect from the internet after the page loads and it still works.
Which format will I get back?
Images keep their original format where the browser supports it (JPG, PNG, WebP). Formats a browser cannot write, like GIF or BMP, come back as PNG. To change format on purpose, use the converter.