Privacy and developer workflows
Base64 Encoder / Decoder
Instant two-way conversion for text and images
🔒 See this tool’s privacy notes for local processing and external service details. Site analytics are described in our privacy policy.
Quick guide
What can Base64 Encoder / Decoder help you do?
Free online Base64 encoder and decoder. Supports text and images. All processing happens in your browser.
Best for
Encode API text, decode standard Base64, or turn an image into a Data URL. Base64 is not encryption and grows data by about 33%.
How to use it
Choose Encode or Decode and type in Input. Image to Base64 reads a local file; Copy takes Output and Clear resets both boxes.
How to read the result
Decoded text should match the UTF-8 input. Image output starts with data:image/; malformed input returns an error.
Privacy and limits
Text and images stay in the browser. Never paste a production token, real password, private key, or raw personal data.
Base64 is not secret. URL-safe input uses - and _; this tool expects + and /. Files grow about 33%.
Frequently Asked Questions
What is Base64?
A binary-to-text encoding used for emails, HTML data URIs, and API payloads.
Is my data uploaded?
No. All encoding/decoding happens in your browser.