Convertisseur de DPI d'Image

Change the DPI of an image for print or web

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À propos de cet outil

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.

Comment utiliser cet outil

  1. Upload target imageAdd the file that needs specific DPI metadata for submission.
  2. Enter required DPI valueSet exact value like 300 DPI based on portal or printer requirement.
  3. Apply metadata updateRewrite DPI info while preserving original pixel width and height.
  4. Download converted fileSave and submit updated image where strict DPI metadata is enforced.

Pourquoi l’utiliser

  • 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.

Usages courants

  • 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.

Conseils pour de meilleurs résultats

  • 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.

Erreurs à éviter

  • 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.

Questions fréquentes

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.

Yes. DPI Converter is free for normal use with no account required, and ToolBox does not add a watermark to your result.

Most tools in this category run in your browser so the file stays on your device. If a tool needs a temporary server job, files are handled for that job only and are not kept as a lasting archive.

No install needed. Open DPI Converter in your browser, add your file or paste your input, then download or copy the result.

Yes on modern mobile browsers. For large files, a desktop browser is usually faster and more reliable.

Try a different quality or format setting, use a smaller input, or open a related tool (for example compress before convert). Keep a copy of the original file before replacing it.

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