Base64 to Text Converter – Convert Base64 Online (Free Tool)
Free online Base64 to Text Converter tool to decode Base64 encoded strings to readable text. Convert Base64 back to plain text instantly. All decoding happens locally.
Example Output
Round-trip with the encoder — UTF-8 bytes restored correctly.
Hello 你好
What is Base64 to Text Converter?
Base64 to Text decodes a Base64 string back into the original UTF-8 text. Tolerant of whitespace and missing padding (=) so you don't have to clean inputs by hand. Useful for inspecting JWT payload chunks, email-encoded subject lines, and data-URI text fragments.
Why use this tool?
- Your data stays private — all processing happens locally in the browser
- No telemetry, no tracking pixels, no third-party scripts
- Open-and-go: bookmark the page once and never look for an alternative
- Round-trips cleanly — convert there and back without losing precision or fidelity
- Strict and lenient parser modes for handling messy real-world data
How to use
- Paste any Base64-encoded text (with or without padding)
- Click Decode — UTF-8 text appears below
- Use Copy to grab the plain text
- Padding is handled automatically — strings missing trailing = signs still decode
Examples
Decode a JWT payload
The middle segment of a JWT is base64url-encoded JSON. Paste it here to read the claims — exp, iss, sub, etc.
Read an email Subject
Subjects with non-ASCII often arrive as "=?UTF-8?B?...?=" — extract the Base64 part and decode to read the original.
Common use cases
- Inspecting Base64-encoded headers or tokens
- Reverse-engineering API payloads
- Debugging encoding pipelines that should round-trip cleanly
- Extracting text from data: URIs
Troubleshooting
- "Invalid Base64 string" error.
- Strip non-Base64 characters (only A-Z, a-z, 0-9, +, /, =, and base64url variants - and _ are valid). Newlines and spaces are tolerated.
Frequently Asked Questions
Simply paste your Base64 encoded string into the input field, and the tool will automatically decode it to readable text.
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