# Change Image DPI

> Rewrites the resolution tag on a JPG, PNG, TIFF, or WebP so it prints at the intended physical size — 300 DPI for press, 72 for screen, whatever the spec calls for. Pixel data and the rest of the EXIF block stay untouched unless you opt into resampling. Metadata edit runs locally.


Live tool: https://lofttools.com/tools/image-tools/dpi-changer

Category: Image Tools

## How it works

1. **Select image** — Drop the image whose DPI tag you want to change, or click to browse
2. **Set DPI** — Enter a custom DPI value or select a preset (72, 150, 300 DPI)
3. **Download** — Get your image with updated DPI metadata instantly

## FAQ

### Does changing DPI change the image dimensions?

By default, only the DPI metadata is changed. You can optionally resample the image to change actual pixel dimensions.

### What DPI should I use for printing?

300 DPI is standard for high-quality prints. 150 DPI works for large posters. 72 DPI is standard for web display.

### Does this preserve EXIF metadata?

EXIF survives. DPI changes only update the resolution tags — the pixel data and the rest of the metadata block come through unchanged.

## Tips

- **Pixels stay untouched by default** — Only the DPI tag changes, so print size shifts without re-encoding the image. Resampling is an opt-in toggle if you also want new pixel dimensions.
- **300 print, 150 poster, 72 web** — Presets match the common print targets so you do not have to memorise which value belongs to which output.
- **Metadata edit happens locally** — JPG, PNG, TIFF, and WebP files are rewritten in your browser — the image never reaches a server.

## Privacy — what we do not do

This tool runs entirely in the browser via WebAssembly. Your file never reaches a Loft Tools server. Specifically:

- **No upload.** The file bytes load into the browser tab's memory and process on your own CPU. Open DevTools → Network and observe zero outbound requests carrying file data while Change Image DPI runs.
- **No AI training on your file.** Loft does not train models. We could not train on a file we cannot see.
- **No content scanning.** No virus, copyright, or content-moderation pass against your file. The bytes are not accessible to us.
- **No server-side log of file contents, filenames, or EXIF metadata.** Cloudflare edge captures URL and truncated IP for abuse defense (standard CDN behaviour). Cloudflare Web Analytics records anonymous page hits, no cookies, no PII. Nothing about your file content reaches any log.
- **No retention.** Close the tab and the file leaves browser memory. No backups exist on our side because no copy ever existed on our side.
- **No account.** No email, no signup, no auth, no telemetry tied to you.
- **Offline-capable after first visit** (PWA). Once you've loaded a tool, it caches; later sessions work without internet. For high-sensitivity files, run the tool once online to warm the cache, then disconnect before processing.

Compare with upload-based services: each transmits your file to a processing server. Even over HTTPS, each has logs, retention windows, and subpoena exposure. Loft has none of these because the server architecture does not include your file.

## More

- All tools: https://lofttools.com/tools
- Category: https://lofttools.com/tools/image-tools
- LLM index: https://lofttools.com/llms.txt