Image DPI Resizer

This tool provides precise control over image DPI and pixel density, enabling consistent asset sizing for print and web. It accepts standard image formats (JPEG, PNG, TIFF) and outputs a file with updated DPI metadata, optionally adjusting the pixel dimensions to reflect a new physical size. By separating density from pixel count, it supports scenarios where print scale must be tuned without altering visual resolution.

Conceptually, changing DPI affects how an image prints. If you modify DPI without resampling, the pixel count remains the same while printed dimensions change; resampling increases or reduces pixel count to meet a target physical size or weight. The tool supports both DPI-only adjustments and full canvas resizing, and can process single images or batches, preserving color profiles and metadata where possible.

Intended users include graphic designers, publishers, photographers, marketing teams, and developers who need predictable asset dimensions across devices and outputs. Its value lies in reproducibility, lossless or near-lossless handling, and explicit validation of inputs (valid DPI ranges, unit consistency, and supported formats). The tool differentiates itself by providing robust error handling, batch operations, and transparent outcomes without editing image content.

Core features and use cases include: input handling for common formats, target DPI value and unit selection, optional width/height in inches or centimeters, aspect-ratio-aware resizing, and export of results with updated metadata. Use cases: generate 300 DPI print-ready images from 72–96 DPI sources; prepare assets for web density standards; convert archival DPI for cataloging; and batch process folders of images to meet production specs.