Free AI Writing Tools
Free tools for checking, cleaning and measuring text, plus two for images. They run in your browser, with no sign-up and no daily cap.UpdatedCheck and clean AI writing
- AI detector: a 0 to 100 score for the whole text and for every sentence, from five writing signals. Needs at least 40 words.
- AI score checker: the detector's score as one number and a plain label, without the sentence list.
- AI humanizer: a cleanup pass that swaps stock AI phrases, removes em dashes and invisible characters, adds contractions and marks same-length sentences for you to vary. It promises no detector result.
- AI text formatter: removes Markdown symbols, turns em dashes into commas, straightens curly quotes and fixes spacing in text copied from a chatbot.
- Invisible character remover: finds zero-width spaces, byte order marks, soft hyphens and other hidden characters, lists what it found and removes them (non-breaking spaces become normal spaces).
- ChatGPT watermark remover: the same cleanup, for text copied from ChatGPT: it shows the narrow no-break spaces, zero-width spaces and other hidden characters a chat app leaves in, and removes them. It changes characters, not wording.
- Contraction expander: expands contractions ("don't" to "do not") or puts them back, keeping capital letters.
Count and convert
- Word counter: words, characters with and without spaces, sentences, paragraphs, and reading and speaking time.
- Character counter: characters with and without spaces, words and lines, and how many are left for an X post, a meta description, a title tag, an Instagram caption or an SMS.
- Reading time calculator: how long a text takes to read at 150, 238 or 300 words per minute, and to say out loud at 150.
- Speech time calculator: how long a script takes to say at four speaking paces, and how many words fit the minutes you have.
- Pages to words calculator: about how many words fill a number of pages, by font, size and line spacing.
- Words to pages converter: the other way round, how many pages a word count or a pasted text fills in your font, size and spacing.
Images
- Background remover: cuts out the person, pet or product in a photo and gives you a PNG on a transparent, white or colored background.
- Image upscaler: makes a picture 2x or 4x larger with an AI model that adds the sharp edges plain resizing blurs.
Rewrite a text in your own wordsPaste it to see what a rewrite costs. Nothing is sent until you choose to.
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Frequently asked questions
Yes. Every tool on this page is free, with no sign-up and no daily cap. The only paid step is Rewrite, an optional full rewrite by a language model, offered under the detector's and the humanizer's results.
The AI detector has its own page. Paste at least 40 words to get a 0 to 100 score and a score for every sentence. It's free and runs in your browser.
No. They run in your browser. Text leaves the page only if you press Rewrite under the detector's or the humanizer's result. The image tools run their AI model in your browser, so your pictures stay on your device.
No. The score is a signal, not proof, and it gets things wrong in both directions. It should never be the only basis for accusing anyone.
No. It's a cleanup pass: it replaces stock AI phrases, removes em dashes and invisible characters, adds contractions and marks same-length sentences so you can vary them. Neither it nor Rewrite can promise any detector's result.
Leap is a creative studio for making films, images, voices and designs with AI models, from ready-made recipes or your own prompt. See what it makes. The writing tools here work without an account.