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DPI Converter

Change the DPI of a JPG or PNG to 72, 150, 300, 600 or any custom value online. Pixels are never resampled. Set your print DPI in seconds — try it now.

Drop files here or click to upload

JPG, JPEG, PNG · up to 20.0 MB per file

Files are private and deleted after conversion

How to use DPI Converter

  1. 01

    Upload your JPG or PNG

    Your file is sent to our servers over an encrypted HTTPS connection for processing.

  2. 02

    Choose a DPI value

    Pick a common preset — 72, 150, 300 or 600 — or enter any custom value from 1 to 3000.

  3. 03

    Your dimensions and resolution stay the same

    Your pixel dimensions and on-screen resolution stay exactly as they were and nothing is resampled — only the print-density tag changes, so your image quality is preserved exactly. For JPG the compressed image data is kept byte-for-byte with no re-encoding; PNG stays fully lossless.

  4. 04

    Download the result

    Get your file back with the new DPI tag applied. The output is automatically deleted from our servers within 24 hours.

Why choose our DPI Converter

Print-ready output

Set the exact DPI your print shop or publishing workflow requires — 72 for screen, 300 for standard photo printing, or any custom value up to 3000 — without resampling or resizing your image.

Works from any device

Because the conversion runs on our servers, it works the same way from a phone, tablet or desktop without needing local processing power.

Encrypted upload, automatic deletion

Your file travels over HTTPS and is automatically deleted from our servers within 24 hours after processing.

Pixels and metadata stay intact

Only the DPI tag is changed: your pixel dimensions and resolution are unchanged, nothing is resampled, and your EXIF and ICC metadata carry through. Your image quality is preserved exactly — JPG keeps its compressed image data byte-for-byte with no re-encoding, and PNG stays fully lossless.

Fast turnaround

Because only the density tag is rewritten — no resizing, resampling or re-encoding — conversion completes in moments.

Settings guide

DPI value (72 / 150 / 300 / 600 or custom 1–3000)
Pick a preset — 72 for screen-only use, 150 for large-format prints, 300 for standard photo printing, 600 for high-detail work — or enter any custom value between 1 and 3000. Only the print-density tag is changed, so your image quality is preserved exactly: your pixel dimensions and on-screen resolution are unchanged and nothing is resampled. For JPG the compressed image data is kept byte-for-byte (no re-encoding); PNG stays fully lossless. Your EXIF and ICC data carry through.

About the formats

JPG

JPG (also written JPEG) is the most widely used lossy image format for photographs, standardized by the Joint Photographic Experts Group in 1992. Practically every camera, phone, and image application can create and open it.

Its strengths are small file sizes for photos and universal compatibility across devices, browsers, and software. The trade-offs: lossy compression introduces artifacts, there is no transparency support, and quality degrades a little more with every re-save. Use JPG for photographs; choose PNG for screenshots, logos, or anything that needs sharp edges or transparency.

PNG

PNG is a lossless raster image format created in the mid-1990s as a patent-free replacement for GIF. It is the standard choice for screenshots, logos, UI graphics, and any image that needs transparency.

PNG preserves every pixel exactly and supports a full 8-bit alpha channel, so text and sharp edges stay crisp. The downside is size: photographs saved as PNG are far larger than the same image as JPG or WebP. Support is universal in browsers and editors, making it a safe default for graphics — just avoid it for large photo collections.

Troubleshooting

Print shop still says the DPI is wrong
Some apps ignore the DPI field and compute density from pixel dimensions and the requested print size. Make sure your image has enough pixels: required pixels = print inches × DPI (a 4×6 inch print at 300 DPI needs 1200×1800).
The image does not look sharper at 300 DPI
DPI never adds detail — it only declares print density, and the pixels are not resampled. If the photo lacks pixels for your print size, upscale or resize it first, then set the DPI.
A viewer still reports 72 DPI after converting
Some viewers ignore the density field and always assume 72 DPI. Check the file with a metadata inspector or the image-size dialog of an editor such as GIMP or Photoshop, which read the real stored value.

FAQ

Does changing DPI change my image's resolution?
No. DPI is metadata that declares print density — it tells printers how many pixels to place per inch. Your pixels are never resampled: a 3000×2000 photo stays 3000×2000. Only the declared print size changes.
Which DPI should I choose?
300 DPI is the standard for quality photo printing, 600 for fine detail or line art, 150 for large prints viewed at a distance, and 72 for screen-only use. You can also enter any custom value from 1 to 3000.
What happens to my uploaded file?
Your file is uploaded over HTTPS and processed on our servers, and outputs are automatically deleted within 24 hours. Only the print-density (DPI) tag is changed — your image quality is preserved exactly. For JPG, the compressed image data is kept byte-for-byte, so there is no re-encoding; PNG stays fully lossless. Your pixel dimensions stay the same, nothing is resampled, and your other metadata (EXIF/ICC) carries through.
Is there a file size limit?
Anonymous users can upload files up to 20 MB, free accounts up to 50 MB, and paid users up to 200 MB. JPG and PNG are supported.
Will every printer or app respect the new DPI value?
Most photo-editing and print software — Photoshop, GIMP, professional print-shop RIPs — reads the DPI tag correctly. Some apps and web viewers ignore it and assume a fixed 72 or 96 DPI, or compute density from pixel dimensions instead. If a specific print shop rejects your file, ask whether they read the DPI tag or only the pixel count.
Do I need an account to use the DPI converter?
No signup is required for a single conversion. Because this tool processes files on our servers rather than in your browser, it counts as one server-side operation under the usage limits described for your account type.
What image formats can I change the DPI of?
JPG and PNG are supported. Both formats have a dedicated density field for the DPI value, and setting it changes only that field — never your pixels. For JPG we rewrite just the density header, leaving the compressed image data byte-for-byte identical (no re-encoding); PNG stays fully lossless.

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