Text & Dev · Free to use
Base64 Encode & Decode
Encode text to Base64 or decode Base64 back to text, locally in your browser.
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How to use the base64 encode/decode
- 1Paste text or a Base64 string.
- 2Toggle Encode or Decode.
- 3Copy the result.
This tool runs in your browser. The text, files and values you enter are not uploaded to our server.
About the base64 encode/decode
Base64 encoding represents binary or text data as ASCII characters — used in data URIs, JWTs, email attachments and APIs. This tool encodes text to Base64 and decodes Base64 back to text (UTF-8 safe), entirely in your browser.
Frequently asked questions
Is this tool free?
Yes — completely free, no signup, no watermark and no limits. Startup OG funds the site through its directory and partner program, not paywalled tools.
Is my file or data uploaded anywhere?
No. Everything runs locally in your browser — your file or text never leaves your device and nothing is stored on a server.
Is Base64 encryption?
No. Base64 is encoding, not encryption — anyone can decode it. Never use it to protect secrets; it only makes data transport-safe.
Why does Base64 make data larger?
It represents every 3 bytes as 4 ASCII characters, so encoded output is roughly 33% larger than the original.