FREE · DEVELOPER TOOLS
Base64 Encoder / Decoder.
Encode UTF-8 text or files to Base64 and decode Base64 locally.
How to use Base64 Encoder / Decoder
Choose text or file mode, select encode or decode, then convert or download.
How it works
Base64 represents bytes using printable characters and typically increases size by about one-third. Text mode uses UTF-8, while file mode preserves bytes. Invalid Base64 is rejected, and decoded binary output can be saved without opening it.
Example
Hello → SGVsbG8=; a binary file → Base64 text.
Questions about Base64 Encoder / Decoder
Is Base64 Encoder / Decoder free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Text up to 200,000 characters; binary file up to 5 MB. Base64 is not encryption. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.