Base64 Decoder – Free, Fast & Private
Decode any Base64 string back to its original text, JSON, or image — instantly, securely, and offline. All decoding happens directly in your browser, never uploaded to any server.
Upload or Paste Base64
or select a file
Drag & Drop Base64 text files here or click to add
Your file stays on your device — never uploaded anywhere.
Decoded Output
Decoded output will appear here.
Why Use Tools Oasis Base64 Decoder?
Tools Oasis gives you a fast and secure Base64 decoding experience. Whether you’re debugging API data, extracting images, or decoding JSON, it all happens privately in your browser.
- 100% Private: No data leaves your device.
- Instant Results: Paste Base64 or drop files and see decoded results instantly.
- Image Preview: Automatically detects and shows decoded images inline.
- One-Click Download: Save decoded content as a file.