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Base64 Inspector

Analyze and validate Base64 content. Inspect MIME headers, calculate overhead size, preview file assets, and download decoded binary blobs.

Base64 Inspector

Validate Base64 strings, detect file signatures, and preview decoded assets.

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How to use Base64 Inspector

  1. Paste your raw Base64 string or a data URI schema.
  2. Check the properties table for format validity, MIME detection, and sizing metrics.
  3. Preview decoded images, audio tracks, text, or click 'Download Decoded Binary File'.

What is Base64 Inspector?

Base64 Inspector decodes and inspects base64 data payloads in-browser. It auto-detects binary signatures (magic bytes) to identify MIME types (PNG, JPEG, WebP, PDF, MP3, MP4) and renders live interactive previews without remote server round-trips.

It computes exact decoded binary sizes and visualizes the 33.3% base64 encoding overhead so you can inspect compression budgets.

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FAQ

Which file previews are supported?
It provides inline previews for images, HTML5 audio/video, PDF embeds, and plain text code blocks.
How is MIME type detected for raw Base64?
It decodes the starting binary segment and inspects the magic bytes (file signature) for common file headers like PNG, JPG, or PDF.

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Author

MW
Marcus Webb"The DevTool Craftsman"

Full-Stack Developer & Tools Architect

Marcus has been writing code since the dial-up era. He has contributed to open-source developer tools, built CI/CD pipelines for startups, and debugged production incidents at 3 AM more times than he would like to admit. His philosophy is that the best developer tool is the one that gets out of your way, and he writes about practical tooling that helps teams ship faster with fewer headaches.

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