Free Online Image DPI Checker & Converter | Trencada

Introduction: Check and Convert Image DPI with Ease Using Trencada

Ever sent a photo to a print shop only to be told it is “too low resolution”? The culprit is often DPI (dots per inch) — the metadata that tells printers how large your image should be on paper. Trencada’s free Image DPI Checker and Converter reads the DPI stored inside your image file, shows exactly how big it will print, and lets you rewrite that metadata to any value from 72 to 600 DPI — all without changing a single pixel. No software to install, no account needed, and because everything runs locally in your browser, your images never leave your device.

How to Use the Image DPI Checker on Trencada

Checking (and optionally converting) your image’s DPI takes less than a minute. Follow these steps:

• Upload Your Image: Drag and drop your image into the upload area or click to browse. The tool reads DPI metadata from JPG (EXIF/JFIF), PNG (pHYs), BMP (header), and TIFF (tags). Note: GIF and WebP do not store DPI metadata.
• View the Results: Instantly see a Detected DPI card (with a source badge showing where the value came from, e.g. “via EXIF”), the pixel dimensions, and the file format. A comparison table shows print size in inches and centimeters at different DPIs — with your detected DPI row highlighted — plus a plain-English verdict (Print-ready, Good for small prints, or Screen resolution).
• Convert the DPI (optional): Pick a preset chip (72, 96, 150, 300, or 600 DPI — 300 is preselected) or type a custom value between 1 and 1200, then click Apply & Download. Only the metadata is rewritten; your pixel dimensions stay exactly the same. The file downloads as yourfilename-300dpi.jpg (or .png / .bmp / .tif). Conversion works for JPEG, PNG, and BMP — and for TIFF only when the file already contains DPI metadata.
• Reset or Re-download: Use the Download again link to fetch the converted file a second time, or hit Reset/Remove to check another image.

Key Features of the Trencada Image DPI Checker

• True Metadata Reading: Reads real DPI values from EXIF, JFIF, PNG pHYs, BMP header, and TIFF tags — never a guess.
• Source Transparency: A badge shows exactly where the DPI value was found (or tells you when none is stored).
• Print-Size Table: See inches and centimeters at 72, 150, and 300 DPI, with your detected value highlighted.
• Print-Readiness Verdicts: Instant guidance on whether your image is print-ready or screen-only.
• Metadata-Only Conversion: Changing DPI rewrites the file header only — image quality and pixels are untouched.
• Presets + Custom Values: One-click chips for 72, 96, 150, 300, and 600 DPI, or any custom value from 1 to 1200.
• 100% Private: All processing happens in your browser with zero uploads — your files never leave your device.
• Free Forever: No subscriptions, no watermarks, no hidden costs.

Why Choose Trencada?

Trencada is your go-to platform for free online file and design utilities. Here is why photographers, designers, and print buyers choose us:

• Free: Every tool is completely free to use, with no account required.
• Private by Design: This tool runs 100% client-side — your images are never uploaded to any server.
• No Installation: Everything works right in your web browser; nothing to download or install.
• Complete Image Toolkit: Pair this with our free online image resizer to fix pixel dimensions before setting DPI, or use the EXIF viewer and remover to inspect or strip photo metadata.

Frequently Asked Questions (FAQ)

Is the Trencada Image DPI Checker really free? Yes! The Image DPI Checker and Converter — like every tool on Trencada — is completely free, with no watermarks, no accounts, and no subscription fees.

Does changing DPI change my image’s quality? No. The tool rewrites only the DPI metadata in the file header; your pixels are never resampled or altered, so quality is identical. It simply tells printers and layout apps how large to render the image.

Which formats can it read and convert? DPI can be read from JPG, PNG, BMP, and TIFF. Conversion to a new DPI works for JPEG, PNG, and BMP — and for TIFF only if the file already contains DPI metadata. GIF and WebP cannot store DPI metadata, so they are check-only.

Are my images uploaded anywhere? No. DPI detection and conversion run 100% in your browser using local file parsing. Your image is never uploaded to Trencada or any other server.

What DPI do I need for printing? Print shops usually ask for 300 DPI. The tool’s verdict tells you at a glance whether your image is print-ready: at 300 DPI with at least 3.5 × 2.5 inches of coverage, you are good to go.

What will the downloaded file be named? Your original filename plus the new DPI — for example, photo-300dpi.jpg. The extension matches the original format (.jpg, .png, .bmp, or .tif).