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.
Change Image DPI Online
Change image DPI online for JPG or PNG files to 72, 150, 300, 600 or any value from 1–3000. Pixel dimensions stay unchanged and are never resampled.
- Print-ready output
- Works from any device
- Encrypted upload, automatic deletion
- Pixels and metadata stay intact
Choose your file
Drop files here or click to upload
JPG, JPEG, PNG· up to 20.0 MB per file
Files are private and deleted after conversion
Anonymous files: 20 MB. Free accounts: 50 MB and batches of 5. Paid accounts: 200 MB and batches of 100.
Why use this Change Image DPI Online?
Change image DPI online for JPG or PNG files to 72, 150, 300, 600 or any value from 1–3000. Pixel dimensions stay unchanged and are never resampled.
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.
How to use the Change Image DPI Online
- 01
Upload your JPG or PNG
Your file is sent to our servers over an encrypted HTTPS connection for processing.
- 02
Choose a DPI value
Pick a common preset — 72, 150, 300 or 600 — or enter any custom value from 1 to 3000.
- 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.
- 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.
Best source settings for the Change Image DPI Online
Choose settings that match the result you need.
↔ Swipe sideways to view every column.
| Need | Recommended setting | Best for |
|---|---|---|
| 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. | 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. |
- Upload your JPG or PNG
- Your file is sent to our servers over an encrypted HTTPS connection for processing.
- Choose a DPI value
- Pick a common preset — 72, 150, 300 or 600 — or enter any custom value from 1 to 3000.
Change Image DPI Online input and output
Review what the tool accepts, how it processes the file, and what it produces.
↔ Swipe sideways to view every column.
| Feature | JPG | PNG |
|---|---|---|
| Format | JPG | PNG |
| Processing | Secure cloud processing | Secure cloud processing |
| Result | Change image DPI online for JPG or PNG files to 72, 150, 300, 600 or any value from 1–3000. Pixel dimensions stay unchanged and are never resampled. | Change image DPI online for JPG or PNG files to 72, 150, 300, 600 or any value from 1–3000. Pixel dimensions stay unchanged and are never resampled. |
Where to use files from the Change Image DPI Online
The output is ready for common workflows supported by its format.
- 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.
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.
Privacy and file handling
This tool uses secure cloud processing for formats or operations browsers cannot handle reliably.
- Secure transfer
- Files are transferred over HTTPS and used only for the requested operation.
- Automatic deletion
- Inputs are removed within 6–24 hours and generated outputs within 24 hours.
- Private downloads
- Results are delivered with expiring signed download links.
Change Image DPI Online 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?
- Use 300 DPI for photo printing, 600 for fine detail, 150 for large prints viewed at a distance, and 72 for screens. You can enter any 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.
- 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.
- 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.
- Do I need an account?
- No. One anonymous server conversion is available without signup.
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Ready to use the Change Image DPI Online?
Change image DPI online for JPG or PNG files to 72, 150, 300, 600 or any value from 1–3000. Pixel dimensions stay unchanged and are never resampled.
Change Image DPI Online