Base64 Encode Decode
Encode UTF-8 text to Base64 and decode Base64 back to text. Free, private, and local-first.
Tool facts
- Upload required
- No
- Signup required
- No
- Category
- Developer Tools
Use Base64 Encode Decode
Encode UTF-8 text to Base64 or decode Base64 back to text.
Encode plain text or decode a Base64 string locally.
What this tool does
How to use Base64 Encode Decode
- 1
Paste plain text, an API token segment, or a Base64 string into the input.
- 2
Click Encode to convert text to Base64, or Decode to read Base64 as text.
- 3
Review errors if the input is not valid Base64.
- 4
Copy the converted result for headers, test fixtures, or debugging.
Examples
Plain text
Hello, World!
Base64
SGVsbG8sIFdvcmxkIQ==
UTF-8 text
CodeVella tools are local-first
Common header
Authorization: Basic <base64-credentials>
Use cases
- Encoding credentials for HTTP Basic Auth headers in local tests
- Decoding Base64 payloads copied from logs
- Checking whether a copied value is valid Base64
- Preparing text-safe values for APIs or configuration files
- Converting JSON with the dedicated JSON to Base64 tool
- Comparing Base64, URL encoding, HTML entities, and hashes
Privacy and usage notes
CodeVella tools are designed to run locally in your browser. Your input is not uploaded to a server, and no account is required.
Generated test data is intended for development, QA, demos, and safe internal workflows.
Frequently asked questions
Is my data uploaded?+
No. This tool is designed to run locally in your browser.
Do I need an account?+
No signup is required for CodeVella tools.
Is Base64 encryption?+
No. Base64 is an encoding format, not encryption. Anyone can decode a Base64 string, so do not use it to protect passwords, secrets, or private tokens.
Does this support Unicode and emoji?+
Yes. The tool encodes and decodes UTF-8 text, so accented characters, symbols, and emoji are handled correctly in modern browsers.
Why does Base64 output look longer than the original text?+
Base64 usually increases size by about one third because it converts binary-safe data into plain text characters that are safe to copy, store, or transmit.