Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 strings back to plain text.
Free Web vs Desktop App
Web (Free)
- +Base64 Encoder & Decoder with basic functionality
- +No signup or account required
- +Works in any modern browser
- -Up to 5 KB input on the web
- -Single tool per page, no integrations
Desktop App ($29 one-time)
- Unlimited size, file encoding support, integrated with HTTP Client
- All 16 developer utilities in one ToolBox
- Plus terminal, HTTP client, database client, Docker manager
- AI agents, code editor, Git client, and 100+ more features
- macOS, Windows, Linux — one-time purchase, own forever
About Base64 Encoder & Decoder
Quickly encode any text to Base64 or decode Base64-encoded strings back to readable text. Handles Unicode characters correctly. One-click swap between encode and decode modes. Essential for working with API payloads, email headers, and data URIs.
Frequently Asked Questions
Is Base64 Encoder & Decoder free to use?
Yes! This online version is completely free with no signup required. Up to 5 KB input on the web. For unlimited usage and full integration with 100+ developer tools, download the 1DevTool desktop app ($29 one-time).
Is my data safe?
Absolutely. All processing happens entirely in your browser. Your data never leaves your machine — nothing is sent to any server. The tool runs 100% client-side using JavaScript.
What do I get with the desktop app?
The desktop app includes Base64 Encoder & Decoder with no limits, plus 15 other developer utilities. Beyond the ToolBox, you get multi-agent AI terminals, HTTP client, database client (26 engines), Docker manager, Git client, code editor, browser preview, and more — all in one workspace. $29 one-time, no subscription.
Like this tool? There's a lot more.
Download 1DevTool to get Base64 Encoder & Decoder with no limits, plus 15 other utilities, AI terminals, HTTP client, database client, and 100+ features.