When you need Diamond output
Diamond is a name that people mostly learn the hard way: a Tamil file opens as random punctuation and letters, and someone finally remembers the font it was typed in. Unicode is the right format for almost everything today, but occasionally a printer, an old layout file or a colleague insists on Diamond. Paste your Unicode Tamil here and the page produces the Diamond version.
The converted text is not meant to look like Tamil on its own
To give you something concrete, this converter stores தமிழ் in Diamond as jkpH;, வணக்கம் as tzf;fk; and நன்றி as ed;wp. Diamond and Bamini share many letters, so they are easy to confuse. In the word தமிழ், Bamini stores ழ as o while Diamond stores it as H, giving jkpo; against jkpH;. If your converted text is right except for the letter ழ, you are probably using the wrong one of the two tools. In a program without the matching font, the result will not look like Tamil. That is how legacy text behaves, and it is not a fault in the conversion.
How to use the converter
Copy the Unicode text, paste it in, convert, and then copy the Diamond result. The best test is to paste a small piece into the real destination and apply the correct font there before converting the whole document.
Testing in the destination
Do not judge the result in a plain editor. Open the application that will receive it, apply the right font, and look at names, numbers and conjunct letters. If the destination expects a slightly different format, a letter or two will come out wrong.
Who tends to need this
People usually need legacy output for a specific reason: a print shop with an older layout setup, a publication that still works in a font-based pipeline, or a recipient who cannot open Unicode files. If that is not you, keep working in Unicode and skip this step. Convert only when something downstream really asks for Diamond.
Small habits that save time
Work from the original text whenever you can, not from a screenshot or a re-typed copy. Convert a short sample first and keep the original file untouched. If a document mixes several fonts, convert each section with its own tool. Clear both boxes before pasting something new so that old text does not sneak into the next job.
Do not throw away the original
Once you have the Diamond output, save it under a separate name. Keep editing the Unicode text instead, then convert again when you need an updated legacy file. That way you never lose the clean version.
Related tools
To move legacy text back into Unicode, use Diamond to Unicode. To write new Tamil from an English keyboard, try English to Tamil typing, or look through all Tamil font converters.
Unicode to Diamond: common questions
My converted text is right except for ழ. What went wrong?
That is the classic Bamini versus Diamond mix-up. The two formats agree on many letters but not all. Try the Bamini converter on the same passage and compare.
Is Dinak the same as Diamond?
For the common words we tried, both gave identical codes. Treat that as a convenience, not a promise, and test any passage with rare letters before relying on it.
Is it free, and do I need an account?
It is free and there is no sign-up. Paste your text, convert it, then copy it or download it as a .txt file.
Will bold, colours and fonts carry over?
No. The converter deals with plain text only. Fonts, sizes, colours and layout have to be reapplied in your editor afterwards.
Do I need the Diamond font to read the result?
You need it only to see Tamil in the program where you paste the result. Without the matching font, legacy output looks like unrelated letters and symbols, which is normal.
Can I convert a Word file or PDF directly?
This is a paste-in tool, so there is no file upload. Copy the text out of the document, paste it in, then copy or download the result. A PDF has to contain real selectable text; scanned pages need OCR first.
Will the conversion change what my text says?
No. Only the way the characters are stored changes, not the language or the wording. Even so, read names, numbers and punctuation once after converting.