DPI Converter

Change DPI in three steps

1. Choose your original JPG, PNG or WebP and read its pixel dimensions and recorded horizontal and vertical resolution.
2. Choose a preset or enter your target DPI. A missing source value means no usable density was found; it is not an instruction to assume 72 DPI.
3. Convert, compare the output with the original on the result page, then download the new file. Reopen the downloaded copy if another application reports a different value.

What a DPI converter changes

A DPI-only change edits density metadata. A 2400 × 3000 image remains 2400 × 3000 pixels after setting 300 DPI. Its indicated print size becomes 8 × 10 inches; no new detail is created. The result verifies the written resolution and pixel dimensions.

For a larger pixel grid, use Image Resizer. For a different file format, use Image Converter. Those tasks can re-encode pixels and have different quality and metadata trade-offs.

Choose a DPI value for the actual print job

A print service may request 300 DPI for a close-viewed photograph or another density for a poster. Ask for the finished dimensions as well as the density: 300 DPI alone does not describe the required image. An 8 × 10 inch print at 300 PPI needs 2400 × 3000 pixels after any crop. A 1200 × 1500 image at the same density corresponds to 4 × 5 inches.

This DPI changer offers 72, 96, 150, 200, 300 and 600 presets plus a custom target. Those are choices for the output label, not measurements of the original. If the source has no usable density or conflicting records, keep that status visible and choose a value based on the destination. Raising the number cannot repair blur, compression or a crop that removed important detail.

• Check how large this image can print

Check the saved copy before delivery

After you change image DPI, compare the actual output with the original: pixel dimensions should stay the same, and the reread density should match the target within the format’s storage precision. JPEG and WebP can use resolution records that differ from PNG’s whole pixels-per-metre representation. A value near 300 in a PNG can be ordinary rounding rather than a failed edit.

Download the output, reopen that exact copy and check both axes. Keep the original until the destination accepts the file. If an application still reports the old value, first confirm its filename and metadata source; a cached preview or another resolution field can explain the difference. Re-encoding a file merely to change a label can unnecessarily discard colour or provenance information.

• Need more detail? Open the DPI Checker
• Watch how to use the DPI Converter

Prepare a photograph for a print service

Suppose you have a 3000 × 2400 photograph and want a 10 × 8 inch print. Divide each pixel edge by its corresponding inch edge: both give 300 PPI. If the file currently says 72 DPI, setting its label to 300 can align the saved metadata with that intended placement. Check whether the print service also has a crop, border or automatic fit option; those choices can change the effective density after you upload.

For a 20 × 16 inch print, the same original gives 150 PPI. Changing its label to 300 does not double its detail. Ask the printer whether that density suits the viewing distance and material, select a smaller print, or obtain a larger original. If you resize, inspect the resulting edges and textures rather than treating the new pixel count as evidence of recovered detail.

• Calculate pixels from inches
• Compare DPI and PPI

Understand missing or conflicting resolution

An image can have clear pixel dimensions but no reliable physical-density record. That is common in files prepared for screens, and it does not by itself make the image unusable. Choose a target density from the print specification instead of guessing a supposed original value. The original status remains useful context when you compare the input and output.

Some files contain multiple records, such as JPEG JFIF density and EXIF resolution. They can disagree after editing or exporting through different applications. A simple properties panel may show one value while another program uses the other. The detailed checker identifies the sources so you can explain the difference. If a format feature cannot be safely rewritten, keep the original and follow the error message instead of assuming that a renamed or partially processed file is ready.

Screen size is a separate requirement

For a website, marketplace listing or presentation, the requested pixel dimensions and file size usually matter directly. A 1920 × 1080 file still has those dimensions after a density-only edit. A browser layout can display it at different sizes without changing its stored image data. CSS uses a reference relationship of 96 pixels per inch; that is a layout convention, not a measurement of the physical pixels on every display.

Read the destination requirements literally. Use this converter for an image density label, the unit calculators for a physical-size calculation and the resizer for a new pixel grid. Keeping those decisions separate makes it easier to identify why an upload was rejected and avoids repeatedly recompressing a photograph while trying to fix the wrong setting.

Your image stays in this browser

This DPI tool processes your image locally and can keep it in browser storage so you can move between the tool and its result. Clear local image removes that working copy. Downloaded files remain wherever you saved them. Phase 1 AI inspection is also local and unlimited. Only an explicit optional CommFor action uploads an image for 1 credit.