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Number formatter

Add thousands separators and set decimal places for the numbers in your text.

Related tools

All Transform & clean tools →
Add line numbersPrefix every line of your text with a sequential line number.Alphabetize wordsSort all the words in your text into alphabetical order.Alternating case (mocking) generatorTurn text into aLtErNaTiNg CaSe for the mocking meme style.Bionic reading converterTurn any text into bionic reading format, which bolds the first part of each word so your eye can move faster while the brain fills in the rest. Adjust the fixation strength, see a live styled preview, and copy a Markdown version to paste anywhere that supports bold.Case converterConvert text to UPPERCASE, lowercase, Title Case or Sentence case.Toggle caseSwap uppercase to lowercase and vice versa for every letter.Comma-separated ↔ linesConvert a comma-separated list into lines, or lines back into a comma list.CSV cleanerTrim spaces, drop empty rows and remove duplicates from a CSV.

Number formatter works straight from this page — free, instant, nothing to install. You will find it under Transform & clean, with Add line numbers and Alphabetize words for the neighbouring cases.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What is Number formatter?

Add thousands separators and set decimal places for the numbers in your text.

When would I actually use this?

Cleaning up a paste before it goes anywhere: stripping duplicates from a list, normalising case, removing accents for a filename, or sorting lines.

What is the most common mistake?

Sorting text as if it were ASCII. Accented letters land after Z in a byte sort, which puts "Zurich" before "Émile" and produces a list no reader will accept.

What else is filed next to it?

Add line numbers, Alphabetize words and Alternating case (mocking) generator share its section. They are not variants of it — being filed together is not the same as being alike — but that is where to look if this turned out not to be the tool you wanted.

Where do the figures come from?

Transformations use the browser's Unicode-aware string handling, so case changes and sorting respect the locale rather than byte order. Nothing is truncated: what comes out is the whole of what went in.

Further reading

All guides →
GuideFormatting Numbers for Six Languages: Separators, Currency and the Parse Back1,234.56 and 1.234,56 are the same number, and confusing them changes the value a reader parses. We ran Intl.NumberFormat for all six site locales and printed every separator — including the invisible one French uses — then measured why parseFloat cannot undo any of it.ExplainerCounting Words Is Ambiguous, and Every Tool Answers DifferentlyA word count is a definition, not a measurement. We counted the same paragraph four ways and got 25, 28, 33 and 38 — then counted 50,000 characters of ordinary prose and got agreement to within 4.5%. The gap is entirely driven by compounds, figures and URLs.How-toNumbering the Lines of a Text for a Review with Several PeopleNumbering starts at 1 and cannot be set to 0, the alignment is spaces rather than zeros, and the remover undoes eight of the eleven separators without touching the indentation. What it still cannot do is tell your numbers from its own.ExplainerSentence Case and Title Case: The Rules Differ by LanguageEnglish title case has three different cutoffs depending on the style guide. French, Spanish, Portuguese and Italian have none at all. German capitalises every noun. The tool knows about none of this — here is exactly what it does.ExplainerRemoving Accents Breaks Search — Until You Do It on Both SidesFolding diacritics is a normalisation step, and normalisation only works when the same function runs on the index and on the query. NFC against NFD with the code points shown, and the letters — ø, ł, ß, œ, ı — that survive the strip untouched.ExplainerSorting Text Is Not One Operation: Four Orderings That All Call Themselves AlphabeticalCode-unit order, natural order and locale collation run on the same list in Node, with the outputs printed. Why Zebra beats apple, why item10 beats item9, and why ä sits next to a in German but after z in Swedish.