Free Image Info Viewer — Dimensions, Format, DPI, Colour Space

Before resizing, converting, printing or uploading, you usually need the basics: how big is it, what aspect ratio, what colour space, what DPI? PikDraw's Image Info Viewer reads all of that from any image in your browser — instantly, with no upload.

What is the Image Info Viewer — Dimensions, Format, DPI & Colour Space?

Image Info Viewer is a file-properties inspector that reads pixel dimensions, file size, format, megapixels, aspect ratio, DPI, colour space, bit depth and orientation. EXIF camera data is shown via our EXIF Viewer; this tool covers file-level properties.

Key features

  • Pixel dimensions and megapixels
  • Auto-reduced aspect ratio
  • File size in human-readable units
  • DPI / resolution (from EXIF when present)
  • Colour space and bit depth
  • Orientation tag
  • Last-modified timestamp
  • 100% client-side

How it works

The file is read via the File API for size and timestamp. The image is loaded into an HTMLImageElement for natural dimensions. Aspect ratio is computed via greatest common divisor for the cleanest fraction. EXIF tags (resolution, colour space, bit depth, orientation) are parsed with EXIFReader when present.

Why use this tool

Right-click → Properties is OS-dependent and rarely shows colour space or DPI. Online inspectors usually upload your file. PikDraw runs in the browser and shows everything in one panel.

Common use cases

  • Sizing for social media (Instagram, Twitter, LinkedIn)
  • Pre-flight check before resize or compression jobs
  • Verifying DPI before sending to a printer
  • Confirming colour space before colour-critical work
  • Auditing files in a CMS or asset pipeline
  • Quick aspect-ratio lookup for crops

How to use this tool

  1. Upload an image — Drop a JPG, PNG, WebP, GIF, BMP or any common format. The tool reads file properties instantly.
  2. Review the info panel — Filename, format, file size, pixel dimensions, megapixels, aspect ratio, DPI, colour space, bit depth, orientation and last-modified timestamp are all displayed.
  3. Copy values if needed — Note dimensions for resize jobs, aspect ratio for social media sizing, or DPI for print.
  4. Inspect further — For deeper EXIF (camera, GPS, settings) jump to our EXIF Viewer. For perceptual fingerprints use Image Hasher.

Who should use this

Designers, photographers, web developers, print operators, content managers, and anyone who needs to size or audit images quickly.

How to get started

Drop an image. Info appears instantly.

Best practices

  • Check aspect ratio before cropping for social platforms
  • Verify DPI before print jobs (300 DPI is standard)
  • Confirm sRGB colour space before uploading to most websites
  • Use EXIF Viewer for camera-specific data

Pro tips

  • Aspect ratio is auto-reduced (e.g. 1920×1080 → 16:9) so you can size for any platform.
  • Megapixels = width × height ÷ 1,000,000 — useful when comparing camera output.
  • DPI = 'dots per inch' — only relevant for print. Web images can ignore it.
  • Colour space 'sRGB' is the universal web standard; 'Adobe RGB' or 'P3' need conversion for some browsers.

Expert insights

💡 Aspect for Social

Check the aspect ratio before uploading — 1:1 for Instagram feed, 9:16 for Stories, 16:9 for YouTube thumbnails.

💡 DPI for Print Only

DPI is metadata — it doesn't affect pixel count. Use DPI Changer if a print shop demands 300 DPI.

💡 EXIF Viewer for Camera Data

Need shutter, aperture, ISO, GPS or lens info? Jump to our EXIF Viewer for the full camera block.

Limitations to be aware of

  • Colour space and bit depth depend on EXIF being present
  • No camera EXIF here (use EXIF Viewer)
  • Single image at a time
  • DPI is metadata only — doesn't affect web rendering

Frequently asked questions

What's the difference between this and EXIF Viewer?
Image Info shows file-level properties (dimensions, size, format, aspect ratio, colour space, DPI) — useful for quick sizing and format checks. EXIF Viewer shows the full camera metadata block (lens, shutter, aperture, GPS, capture date). Use Info for sizing, EXIF for provenance.
Why does my photo say '72 DPI' when I want 300 DPI for print?
Most cameras default to 72 DPI in the EXIF resolution tag because DPI only matters for physical print size, not pixel count. Use our DPI Changer to bump the tag to 300 DPI before sending to a printer — the pixel data is unchanged, only the print-size hint.
What's a good aspect ratio for Instagram?
Instagram feed: 1:1 (square) or 4:5 (portrait). Stories/Reels: 9:16. YouTube thumbnail: 16:9. Use this tool to verify your image matches before uploading.
Is the file uploaded?
No. All properties are read in your browser via File API and Canvas. The file never leaves your tab.
Why is megapixels rounded?
Camera marketing uses megapixels to 1 decimal place (12.1 MP, 24.2 MP). We round to 2 decimals for a closer match to spec sheets.
What about bit depth and colour space?
These come from EXIF when present. JPEGs from cameras typically embed both; screenshots and edited PNGs often don't. Where missing, we show '—' rather than guessing.

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