Step 1
Choose encode or decode
Decide whether you are preparing data for transport or inspecting data that arrived encoded.
ToolsBase64 Tool
converters
Encode and decode Base64 without corrupting your data
Work with standard and URL-safe Base64 strings, inspect output quickly, and avoid padding or charset mistakes.
How to use it
3
Examples to try
3
Frequently asked questions
3
Related tools
5
base64 encode decodebase64 decoderurl safe base64base64 tooldecode api token
How to use it
6Base64 is common in APIs, tokens, and embedded assets, but it is easy to confuse it with encryption or to mis-handle URL-safe variants. This page front-loads the core explanations while keeping the transformer itself interactive.
How to use it
6Base64 is common in APIs, tokens, and embedded assets, but it is easy to confuse it with encryption or to mis-handle URL-safe variants. This page front-loads the core explanations while keeping the transformer itself interactive.
Step 2
Confirm the source format
Check whether the string is standard Base64, URL-safe Base64, or plain text before converting.
Step 3
Review the decoded output safely
Inspect the bytes or text and remove sensitive content before copying results elsewhere.
What teams use it for
- Decode copied JWT segments or API tokens for inspection.
- Convert a small binary snippet into embeddable text.
- Debug transport bugs caused by URL-safe substitutions or missing padding.
Examples to try
6Decode a token payload to verify it contains the expected JSON.
Examples to try
6Decode a token payload to verify it contains the expected JSON.
Examples to try
- Decode a token payload to verify it contains the expected JSON.
- Encode a short SVG or image snippet before embedding it in a test page.
- Compare standard and URL-safe encodings for the same source string.
Common pitfalls
- Treating Base64 as encryption instead of plain encoding.
- Ignoring missing padding or URL-safe replacements during decoding.
- Copying decoded secrets into logs, docs, or chat messages.
Frequently asked questions
3Is Base64 secure?
Frequently asked questions
3Is Base64 secure?
Is Base64 secure?
No. Base64 is an encoding format for transport and embedding. Anyone can decode it if they have the string.
Why does my decoded output look broken?
You may be using the wrong charset, a URL-safe variant, or an input string with missing padding.
When should I use URL-safe Base64?
Use the URL-safe variant when the output will be placed in URLs, cookies, or tokens that cannot safely contain plus and slash characters.
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