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Lipogram checker

Check whether a text is a lipogram — writing that deliberately avoids one or more chosen letters, like Perec's novel that never uses the letter e. Enter your forbidden letters and it counts every violation, shows which banned letters slipped through, and gives a purity score. Accents fold to their base letter.

Open Lipogram checker and you get an answer straight away, with no account to create. Its place is under Counting & analysis; Pangram checker and Pig Latin translator answer the questions closest to this one.

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 does Lipogram checker do?

Check whether a text is a lipogram — writing that deliberately avoids one or more chosen letters, like Perec's novel that never uses the letter e. Enter your forbidden letters and it counts every violation, shows which banned letters slipped through, and gives a purity score. Accents fold to their base letter.

When would I actually use this?

Fitting a piece to a limit: an essay to a word count, a post to a network's cap, a meta description to what a result page will show.

What is the most common mistake?

Assuming one character equals one unit of the limit. An emoji can cost two or more, a combining accent can cost two, and several platforms bill a link at a flat rate regardless of length.

What else is filed next to it?

Pangram checker, Pig Latin translator and Smart quotes remover 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?

Counting follows Unicode: the tool reports code points and grapheme clusters separately, because they differ for emoji and combining marks. Per-network limits come from each platform's published specification.

Further reading

All guides
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.ExplainerWord Frequency and Zipf's Law: We Counted Six Books in Six Languages and Fitted the SlopeThe nth most common word appears about 1/n as often as the first. We counted six public-domain books, printed rank × frequency, fitted log frequency against log rank, and got slopes between -1.02 and -1.08 in all six languages — plus the two places the law breaks.ExplainerWhere a Line May Break: The Unicode Algorithm Behind Every Wrapped Paragraph"Break at spaces" fails in most of the world's writing systems. UAX #14 gives every character a line-break class; we looked ours up in Unicode 17.0.0 and ran a conforming implementation over no-break spaces, soft hyphens, zero-width spaces, URLs, Japanese and Thai.ExplainerCounting Characters Against a Limit Someone Else SetOne emoji is 1 character, or 7, or 11, or 25, depending on who is counting. Which one your form, your database and your SMS gateway mean — and a one-paste test that tells you which you are facing.ExplainerWhat Readability Scores Actually Measure (and the Three Things They Cannot See)Flesch Reading Ease and Flesch-Kincaid Grade Level count syllables and sentence length. Nothing else. Both formulas in full, one passage scored end to end, and the comma trick that buys 3.9 grade levels without changing a word.ExplainerHow Fast Do You Read? Average Reading Speed and How to Measure ItMost adults read prose at about 200-250 words per minute. Learn what a normal reading speed is, how to measure yours in a minute, and why comprehension matters more than raw speed.