base64

Base64 Encode / Decode — Convert any text to Base64, or decode Base64 back to readable text. Full unicode support.

Image to Base64 — Encode an image as a Base64 data URI — paste it into CSS, HTML, or JSON. Optional CSS <code>url(...)</code> wrapper.

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

Validate Base64 strings, detect standard vs URL-safe variants, see decoded preview. Measure data size and check padding. Free browser-based tool, no uploads.