Flesch-Kincaid
FK readability metrics (reading ease and grade level).
Language Detection
Detect the language of a particular string.
PII Detection & Redaction
Find and redact emails, phone numbers, SSNs, card numbers, IPs, IBANs and routing numbers.
Profanity Filter
Detect whether a given string contains profanity/vulgar language.
Content Safety Checker
Score text for toxicity, harassment, hate speech, and other unsafe content.
Roster Diff
Compute the difference between two rosters of emails.
Similar Terms (Meaning)
Find similar terms in dictionary based on similarity in semantic meaning.
Similar Terms (Spelling)
Find similar terms in dictionary based on edit distance. [Coming soon]
Informal to Formal Sentence Rewriter
Given a casual input text, generate a more formal/professional output.
Passive Voice Checker
Detect whether sentences are in the passive voice or not.
Passive to Active Sentence Rewriter
Generate sentence in the active voice given sentence in the passive voice.
Active to Passive Sentence Rewriter
Generate sentence in the passive voice given sentence in the active voice.
Paraphraser
Generate rewordings and rephrasings of an input sentence.
Rewording Tool
Generate rewordings of an input sentence.
Text Shortener
Rewrite text to about half its length while preserving the meaning and tone.
Text Expander
Rewrite text to be longer and more detailed while preserving the meaning.
Sentence Rewriter / Tone Rewriter
Given a sentence, generate rewrites of that sentence in a target tone.
Tense Rewriter / Converter
Given a sentence, rewrite that sentence in a target tense (simple past, present continuous, etc.).
Summarizer
Given a piece of text, generate a short summary.
Acronym Generator
Given an idea, generate several acronyms.
Title Generator
Given a document (email, article, or post) generate a title.
SEO Meta Generator
Generate title tags, meta descriptions, a URL slug and focus keywords from any article.
Sentence Splitter
Given a sentence, split it into two or more sentences.
Medical Spell Checker
Check for spelling errors in medical and healthcare-related terms.
Pharmaceutical Spell Checker
Check for spelling errors in pharmaceutical terms.
Webpage Grammar and Spell Check
Check for spelling and grammar errors on a webpage by entering the URL.
Data Extractor
Pull the fields you name out of any unstructured text as typed JSON, with the evidence for every value.
Tone Checker
Detect the tone of a given sentence or document.
Sentiment Analysis
Detect the sentiment of a given sentence or document.
Text Classifier
Classify any text into your own categories — intent, topic, routing — with no training data.
AI Detector
Detect whether text is AI-generated.
Writing Quality Checker
Score writing quality 1–5 with per-sentence scores and an AI rubric with suggested fixes.
Issue Highlighter
Proofreading and self-editing tool that identifies common issues in text.
DEI Issue Highlighter
Proofreading tool that identifies diversity, equity and inclusion (DEI) issues in text.
Spell Checker
Neural spellcheck tool that corrects contextual spelling errors.
Case Converter
Capitalize text using Sapling's AI-powered tool.
Missing a tool you need?
Tell us what you'd use — a lot of these started as a request.