Image DPI Converter
Change the DPI of an image for print or web
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
Drop a JPG or PNG image
Supports JPG and PNG
About this tool
Changes an image's DPI (dots per inch) metadata value - the setting that tells printers and some software how densely to print the image's pixels per inch. It's commonly needed when a print shop or submission portal requires a specific DPI value (like 300) before accepting a file.
How to use this tool
- Upload target imageAdd the file that needs specific DPI metadata for submission.
- Enter required DPI valueSet exact value like 300 DPI based on portal or printer requirement.
- Apply metadata updateRewrite DPI info while preserving original pixel width and height.
- Download converted fileSave and submit updated image where strict DPI metadata is enforced.
How to make a 300 DPI image for a print shop
Set the DPI to 300 and download the image. The pixels stay exactly the same - only the stored DPI value changes - which is what most print shops and submission portals check for.
The value has to match the print size you need: for a 6 x 4 inch print at 300 DPI, the image should be at least 1800 x 1200 pixels. If it is smaller, changing the DPI number will not make it sharper.
Key features
- Meets print-shop or form requirements that enforce metadata checks.
- Fast way to standardize DPI labels across multiple assets.
- Preserves pixel dimensions when only metadata change is required.
- Useful companion to resolution and upscaling workflows.
Common uses
- Preparing ID, visa, or official form photos with mandatory DPI values.
- Fixing rejected print uploads due to metadata mismatch.
- Standardizing product image files for publication pipelines.
- Aligning old scans to consistent print metadata standards.
Tips for better results
- Check required pixel dimensions in addition to DPI value.
- Use upscaler/resizer if true resolution is too low for print.
- Keep original file before metadata changes for traceability.
- Validate converted file in target software before final delivery.
Mistakes to avoid
- Expecting DPI metadata change to magically add image detail.
- Changing DPI while ignoring required physical print dimensions.
- Submitting without verifying updated metadata persisted.
- Using converted low-resolution images for close-up print jobs.
Frequently asked questions
No - DPI is just metadata describing print density; changing it doesn't add or remove actual pixel detail. If your image genuinely needs more detail for print, use the Image Upscaler tool or start with a higher-resolution source.
DPI tells the printer how large to physically print each pixel - a specific DPI requirement ensures the final printed size and sharpness matches what the service expects.
Typically no - it only updates the DPI metadata field, leaving the actual pixel width and height unchanged, unless you specifically also choose to resize.
Set the DPI value to 300 here. If the pixel dimensions are too small for the size they want - width in inches times 300 - you need a larger original or an upscaler; changing the tag alone adds no detail.
Word, InDesign, Photoshop and most print workflows use it to decide the default size an image is placed at. Web browsers ignore it completely.
Word sizes inserted images using their DPI: a 3000 px image tagged 72 DPI is placed about 42 inches wide. Setting 300 DPI here makes it arrive at a sensible 10 inches.