Unsupported input
The tool may reject input that does not match the expected content, structure, or file type.
Fix: Confirm the tool input requirements and paste the correct type of data.
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Encode or decode Base64 strings
Output will appear here...
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Last reviewed:
Base64 is a binary-to-text encoding that represents arbitrary data using 64 printable ASCII characters, commonly used to embed binary blobs in JSON, URLs, and emails.
Base64 Encoder/Decoder is an online tool that helps you encode Base64 /.
It encodes base64 / so the output is text-safe and ready to paste inline into HTML, CSS, JSON, or email templates.
Start with the base64 / input you want to process in Base64 Encoder/Decoder.
Get a base64 / result from Base64 Encoder/Decoder that is ready to review, copy, and reuse in the next step of your workflow.
The tool may reject input that does not match the expected content, structure, or file type.
Fix: Confirm the tool input requirements and paste the correct type of data.
Missing fields or partial content can block processing or produce weak results.
Fix: Provide the full required input before running the tool.
Sample or placeholder values can lead to output that looks valid but is not ready for real use.
Fix: Replace placeholders with your actual values before relying on the result.
Use the copy-to-clipboard button or the download action on the output panel to move the result straight into your editor, ticket, or build pipeline.
Reach for Base64 Encoder/Decoder when you need to encode Base64 / for a quick check, debug session, code review, or ticket comment — a CLI or library is better for scripted pipelines, but Base64 Encoder/Decoder removes the setup cost for one-off work.
Most of the processing is client-side, so once the page has loaded you can keep using Base64 Encoder/Decoder even if your connection drops — unless the tool explicitly hits a backend API for data it can't compute locally.
Encode or decode Base64 strings. Use it when you need a faster browser-based way to encode Base64 /.
Yes. Base64 Encoder/Decoder is a free browser-based tool — no sign-up, no watermark, no rate limits for typical developer workflows.
Continue the workflow with related tools for base64 /, adjacent input and output steps, or other utilities in the same category. You can also browse the full Encoders & Decoders category for more options.
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Normalise a YAML document and encode it as UTF-8 Base64 — ideal for Kubernetes Secrets
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Convert ASCII text into a list of byte values (0–255)