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HTML to Base64 Converter
Encode HTML source as Base64 without rendering or executing the markup. Processed in your browser.
Maximum pasted length: 24 MiB characters. Decoded files: 16 MiB. Oversized input is rejected when run.
Your result appears here
Run the tool to inspect the output. Input stays on this device.
How to use HTML to Base64 Converter
- Paste the source value into the input field.
- Run the tool and review its result or validation message.
- Download the complete result, or copy text output. Clear removes the result and releases its download.
Does this upload my data?
No. This tool runs in a browser worker. Input is not stored or sent to a server.
Does Base64 change a file format?
No. Encoding and decoding preserve bytes. A format-specific tool checks the signature, but does not transcode or guarantee that a file is intact. Some media may not play in your browser; the download still preserves the bytes. SVG and HTML are never rendered here.