What it is
Base64 Encoder / Decoder is a free in-browser Base64 encoder and decoder that encodes text and images to Base64 and decodes Base64 strings — with local image preview and batch support — without uploading anything. It is free, requires no signup, and works in any modern browser. Everything runs locally on your device — there is no server-side processing of the data you put into the tool.
Who it's for
It's for developers embedding images in HTML/CSS, working with Base64-encoded API payloads, or needing to encode/decode values in a safe, private environment. The tool is designed for quick one-off use: open the page, do the thing, close the tab.
How we keep it free
- Your tool inputs never leave your browser. The tool does not ask for, store, or transmit anything you type or paste.
- Non-personalised ads (Google AdSense). We display contextual ads. By default these are non-personalised — no cross-site tracking cookies are used unless you explicitly grant consent via the consent prompt.
- Aggregate page analytics (Google Analytics 4). We collect anonymised page metrics (pages visited, approximate country, browser family). Consent Mode v2 is configured with all storage denied by default. See the privacy policy for retention periods and GDPR legal basis.
- Privacy-preserving infrastructure analytics via Cloudflare Web Analytics — cookieless, no fingerprinting.
Why we built it
Most tools of this kind are bloated with signups, paywalls, or third-party scripts that exfiltrate the data you paste in. This site is part of a small portfolio of utility sites run by ThinkStack Limited that try to do the opposite: one job, done well, in the browser, with the privacy story explicit and the ads strictly non-personalised by default.
See the privacy policy for the full data story or email info@brighttoolstudio.com with questions.