Do I need to specify the original encoding in Encoding Converter?

No — the original encoding field is optional in Encoding Converter. The tool's own interface labels it "From (Optional)" and notes that specifying it is "optional but recommended." You can leave it blank and still convert files, but filling it in gives the converter a known starting point instead of making it guess, which reduces the chance of garbled or misread characters in the output.

What the tool actually says

The page evidence for encoding-converter.netlify.app is short but specific:

• The "From" field is marked Optional.
• The site states: "Specifying the original encoding is optional but recommended."
• The recommended order of operations is: specify the encodings first, then select the files.

That last point matters. The tool is designed around setting your encoding options before uploading, so if you plan to provide the source encoding, do it before you add files rather than after.

What happens if you leave it blank

The site does not document its exact fallback behavior, so the honest answer is: the converter has to determine the source encoding some other way — typically through automatic detection or a default assumption. Because the tool doesn't publish which method it uses, you can't predict the result with certainty.

That uncertainty is the real cost of skipping the field. It's not that conversion fails; it's that you may not notice a problem until you open the output file.

When it's safe to skip it

Leaving "From" empty is reasonable when:

• You don't know the source encoding and have no easy way to find out.
• You're converting a batch and just want to see whether the output looks correct.
• The files are plain ASCII or otherwise simple enough that most encodings agree on the characters.

When you should fill it in

Provide the original encoding when:

• The text contains non-ASCII characters — accented letters, Cyrillic, CJK, emoji, currency symbols. These are exactly where wrong assumptions show up as mojibake (for example, é where you expected é).
• You're converting a batch or a .zip. The tool supports single files, many files, and .zip archives. A wrong guess applied across many files multiplies the cleanup work.
• You already know the source encoding. If you exported the file from another system, or a previous tool told you what it was, there's no reason to withhold that information.
• You're converting to a specific target and need the result to be exact — for example, moving legacy data into a UTF-8 pipeline.

A practical workflow

1. Determine the source encoding if you can. If you don't know it, try opening the file and checking your editor's encoding indicator, or convert a single sample file first and inspect the result.
2. Set the From encoding (if known) and the To encoding in the tool.
3. Upload your files — a single file, multiple files, or a .zip.
4. Open the converted output and check characters that are likely to break: accents, quotes, dashes, non-Latin scripts.
5. If the output is garbled, re-run with the source encoding explicitly set, or try the next most likely source encoding.

The short version

The field being optional means you won't be blocked. The recommendation to fill it means the tool's accuracy depends on information only you may have. When in doubt, convert one file first, check it, then run the rest.