DPI Changer

Change DPI. Preserve Quality — in seconds.

Understanding DPI & PPI

What is DPI?

DPI (Dots Per Inch) or PPI (Pixels Per Inch) is metadata that tells applications how large an image should appear when printed or displayed. It's a density value, not a dimension.

DPI vs Image Size

Your image's pixel dimensions (e.g., 1920×1080) define its actual size. DPI only affects physical output size. A 1920px image at 72 DPI prints larger than the same image at 300 DPI.

Metadata Only

This tool updates DPI metadata without resampling. Your pixel dimensions stay identical. No quality loss. Perfect for print preparation or meeting specific requirements.

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Drop your image here or click to browse

JPG, PNG, WebP · Max 69 MB per file · Multiple files supported

DPI Settings

Note: Changes DPI metadata only – pixel dimensions remain unchanged.
Preview Filename Original DPI New DPI Dimensions File Size Action
Preview Filename Original DPI New DPI Dimensions File Size Action
Note: This is a read-only view of all uploaded images.
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Preview

📖 Guide & FAQ

🖼️ How to Change Image DPI

  • 1 Click the upload zone or drag & drop your JPG or PNG images into the box. Multiple files are supported.
  • 2 Your images appear in the table showing their original DPI, dimensions, and file size.
  • 3 Enter a custom DPI value in the input field, or click one of the quick presets — 72, 96, 150, or 300 DPI.
  • 4 Click Apply to All Images to update the DPI metadata across every uploaded image at once.
  • 5 Click Download on any row to save that image with the new DPI embedded in its metadata.
  • 6 Use Download All to save every image in one go.

💡 Tips

  • ✦ DPI change is metadata-only — your pixel dimensions never change and image quality is fully preserved.
  • ✦ Use 72 DPI for screen/web, 300 DPI for professional print.
  • ✦ Click any thumbnail in the table to preview the full image.
  • ✦ All processing happens in your browser — no images are ever uploaded to a server.

⭐ Why Use This Tool?

Most DPI tools either resample your image (degrading quality) or send your files to a remote server. This tool does neither.

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100% Private
Your images never leave your device. All processing runs locally in your browser — no servers, no uploads, no data collection.
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Instant Processing
No upload wait times. DPI changes happen in milliseconds using your own hardware.
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Metadata Only
Only the DPI metadata tag is updated. Pixel dimensions, colors, and image quality are completely untouched.
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Batch Support
Upload and convert multiple images at once. Apply the same DPI to all with a single click.
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Free, No Sign-up
No account, no subscription, no watermarks. Open the page and start working immediately.
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Works Everywhere
Fully responsive — works on any device, any screen size, any modern browser.

❓ Frequently Asked Questions

DPI (Dots Per Inch) is metadata that tells software how large an image should print. A 1000×1000px image at 100 DPI prints at 10×10 inches; the same image at 300 DPI prints at 3.3×3.3 inches — same pixels, different physical size.
No. This tool only updates the DPI metadata tag inside the file. Pixels, colors, and visual quality are completely untouched. File size may change very slightly (a few bytes) due to metadata rewriting, but visually the image is identical.
Absolutely not. Everything runs 100% in your browser using the Canvas API and binary metadata manipulation. Your images never leave your device and no data is sent anywhere.
JPG / JPEG and PNG formats are supported, up to 69 MB per file. JPEG DPI is stored in the JFIF APP0 header, PNG DPI is stored in the pHYs chunk — both are correctly updated by this tool.
300 DPI is the industry standard for high-quality print. 150 DPI works for large-format prints viewed from a distance. 72–96 DPI is standard for screen/web use only.
Yes! Upload as many images as you need, enter your desired DPI, then click "Apply to All Images". Each image will be processed and made available for individual download.
Make sure you're opening the downloaded file (not the original). Some apps cache file info — try closing and reopening the file, or use File → Properties to verify the updated DPI.