Input is rejected
remove surrounding quotes, confirm the Standard/URL-safe setting, check padding and verify that the value was not truncated.
Convert Base64 to TSV
Decode Base64 to TSV, review the restored output and copy or download it. Use the standard or URL-safe option required by the source.
Base64 utility · Fast, exact Base64 conversion
What this tool does
Paste the Base64 value and decode it to TSV. The tool returns the corresponding byte or text representation; it does not automatically validate, reformat or execute the result.
Convert now
1
Enter or upload
Paste text or choose a file
2
Choose an action
Encode, decode or inspect
3
View results
Review output and byte details
1. Input
0 characters
2. Action
3. Output
0 characters
4. Quick actions
5. Base64 information
DescriptionBase64 represents bytes as text; it is not encryption.
AlphabetA-Z, a-z, 0-9, +, /, =
Input size0 characters / 0 bytes
Output size0 characters / 0 bytes
PaddingUses = to complete a four-character group.
StatusReady
How it works
Input bytes
101010 111100 110101 ...
Split into 6-bit groups
101010 111100 110101 ...
Convert to indexes
42 60 53 ...
Base64 characters
q 8 1 ...
How to convert Base64 to TSV
Paste the Base64 string you want to decode.
Keep Decode selected and choose Standard or URL-safe Base64 when the control is available.
Review the output and byte information, then copy or download the result.
Output and format behavior
The output is tab-separated text. Tabs and line endings remain, but the tool does not infer columns or repair malformed rows.
Use Standard Base64 for the normal RFC 4648 alphabet. Use URL-safe only when the receiving system expects Base64URL; padding rules can differ by protocol.
Expert tip
Document the delimiter, line ending and character encoding beside the payload so another system can reconstruct the same table dialect.
When this is useful
Typical workflows include:
- Preserve delimiters, tabs and line endings when moving table text through a field that otherwise alters whitespace.
- Return encoded source to readable text for audit, code review or troubleshooting.
- Create a reproducible test fixture without manually rewriting the source bytes.
Limitations and safety
Important constraints:
- Base64 normally adds about one third to the byte payload, before any data-URL prefix or surrounding markup.
- Base64 is reversible encoding, not encryption. Anyone who receives the string can decode the original bytes.
- The converter preserves the supplied table text; it does not detect delimiters, normalize rows, infer types or repair malformed data.
Troubleshooting
Decoded text is unreadable
the bytes may not be UTF-8 or may be binary. Inspect the same payload with the hex or binary page.
Frequently asked questions
What exactly is preserved?
The output is tab-separated text. Tabs and line endings remain, but the tool does not infer columns or repair malformed rows.
Does this page validate the source format?
No. It converts the supplied text or bytes. Use a dedicated parser, formatter or validator when syntax correctness matters.
What is the difference between standard Base64 and Base64URL?
Standard Base64 uses + and /. Base64URL uses - and _ and may omit padding; choose the form required by the receiving system.
Why is my Base64 input rejected?
Check for unsupported characters, a Standard/Base64URL mismatch, damaged padding or a truncated value. Also remove surrounding quotes that are not part of the payload.
Related Base64 tools
Continue with the localized page that matches the next operation:
Paste your input above, run the conversion, and copy or download the result.