Text to Base64 Encoder and Decoder
Convert plain text to Base64 or decode Base64 back to readable text.
How to Use Base64 Encoder and Decoder
Base64 Encoder and Decoder is for real text payloads, API snippets, data URIs, and tokens that need a quick encode or decode check.
- Paste the exact string you need to encode or decode, including padding characters when they are part of the payload.
- Choose encode or decode based on the next system that will read the text, such as an API, header, or data URI.
- Convert once, then compare the first and last characters so missing padding or whitespace does not slip through.
- Base64 changes representation only; it does not protect secrets or make private data safe.
- Label copied strings with their source or target field so encoded and decoded versions do not get mixed up.
Things to Check
- Base64 is not encryption, a base64 cipher, or a security layer; anyone can decode it.
- Very large blobs or pasted file data can fill browser memory; split the payload before decoding on low-memory devices.
- Test the output in the API client, config file, HTML attribute, or script that will consume it.
Base64 Encoding Notes
People sometimes search for a base64 cipher or encoded 64 text, but Base64 is encoding, not encryption. It changes text into a transport-friendly format for data URLs, API payloads, tokens, and configuration values; it does not hide secrets from someone who can read the string.
Helpful FAQ
When is this tool most useful?
Use it for quick local checks of Base64 text, small data fragments, and copied development payloads.
What should I inspect before using the output?
Check padding, line breaks, Unicode characters, and whether the decoded text is safe to paste into its destination.
Does this replace a specialist editor?
For encryption, signing, binary file repair, or secret handling, use security-focused tooling instead.
Maintained by Taimour Husnain.
Standard and URL-safe Base64 text
Standard Base64 uses letters, digits, plus, slash, and optional equals-sign padding. URL-safe Base64 substitutes hyphen and underscore so the alphabet is easier to carry in URL components. The decoder accepts either alphabet and restores omitted padding when the length is valid.
The tool encodes and decodes UTF-8 text. It does not execute JavaScript, Bash, Python, Java, Linux, or macOS commands, decrypt secrets, inspect a remote URL, or convert arbitrary binary files. For an image data URL, use the Image to Base64 Converter.
Convert images to data URLs with Base64
A data URL embeds image data directly in HTML or CSS using the data:image/png;base64, prefix followed by Base64-encoded bytes. This eliminates an extra HTTP request for small icons, logos, and UI elements, and is useful for inline email signatures or CSS backgrounds.
To create a data URL, encode the image as Base64 using the Image to Base64 Converter and prepend the MIME type prefix. PNG and JPEG are most common; SVG data URLs use data:image/svg+xml, with URL-encoded markup. Keep data URLs under 32 KB — larger images increase page load time because the encoded string is 33% larger than the binary file.