Sentence Diagram Generator for Any English Sentence
Paste an English sentence and the AI draws a labeled Reed-Kellogg sentence diagram — subject, verb, direct object, modifiers, prepositional phrases, and subordinate clauses all on the right lines, ready for grammar class, ELA worksheets, and homeschool review.
Sentence Diagram Generator
Aspect Ratio
Quality
Free trial: 5 credits, 2K resolution with watermark

Sign in to start diagramming your own sentences
Example Sentence Diagrams
Diagram a Sentence Without Drawing the Lines Yourself
No protractor. No graph paper. No drag-and-drop editor.
Stop redrawing baselines and slanted modifier lines by hand. Type the sentence you need to diagram, choose Reed-Kellogg style or a blank worksheet, and the sentence diagram generator returns a printable image with every word in the right place — for English, ELA, ESL, and homeschool grammar lessons.
Type or Paste an English Sentence
Drop in a simple, compound, complex, or compound-complex sentence — up to about 40 words. Add a short note if you want a color-coded parts-of-speech version, a blank worksheet for students, or extra labels above each word.
AI Parses the Sentence and Builds the Diagram
The sentence diagrammer identifies subject and verb, draws the main horizontal baseline, places direct and indirect objects after the verb, slants modifiers under their target words, and lifts subordinate clauses onto a stilted second baseline — preserving the original wording at every step.
Download the Worksheet as PNG or PDF
Export a 4K PNG for projecting in class, a print-ready PDF for handouts, or a transparent PNG to drop into your slide deck or Google Doc. Pair labeled answer keys with blank versions for a complete grammar worksheet.
One Sentence Diagram Generator, Three Classroom Workflows
ELA Teachers · Homeschool Parents · Tutors and Students
The same Reed-Kellogg sentence diagram generator handles middle-school grammar warm-ups, classical homeschool curricula, and one-on-one ESL tutoring — without spending a planning period on a single diagram.
Students and ESL Learners
Middle school, high school, and college English
You can identify the subject and verb in your head — you just need a clean Reed-Kellogg diagram on the page. Paste any English sentence and get a labeled worksheet for grammar homework, SAT writing review, or ESL self-study in 30 seconds.
- Handles relative clauses, gerunds, infinitives, and participles
- Renders in under 30 seconds — works at 11 PM before class
- Free credits on sign-up — no payment info required
Grammar Teachers and ELA Instructors
K-12, ESL, and college composition
Build a full week of grammar warm-ups, sentence diagramming practice, and answer keys in one prep period. Generate a labeled version for your slide deck and a blank version for students — from the same sentence, in one click.
- Generate labeled answer keys and blank worksheets side by side
- Drop straight into Google Slides, Canva, or a printed packet
- Consistent Reed-Kellogg style across every worksheet
Homeschool Parents and Tutors
Classical education and one-on-one tutoring
Classical curricula like Shurley, Easy Grammar, and Analytical Grammar rely on sentence diagramming — and so do most diagnostic grammar tutors. The sentence diagram maker keeps your lesson plan moving when you hit a sentence you don't want to draw freehand.
- Matches Reed-Kellogg conventions used in classical curricula
- Side-by-side worksheets for parent answer key + child practice
- Color-coded parts of speech for ADHD and visual learners
Sentence Diagrams Generated by AI
Real classroom sentences, real Reed-Kellogg diagrams
Every diagram below was generated from a plain-text sentence and a short style hint. Click any example to load the prompt and try a sentence of your own.
What Makes This Sentence Diagram Generator Different
Not Another Random Word-Tagger
Most online sentence diagrammers label parts of speech in a list and call it done. This Reed-Kellogg sentence diagram generator draws the actual baseline, the slanted modifier lines, the prepositional phrase connectors, and the subordinate clause stilts — and keeps the original sentence wording on every line.
Real Reed-Kellogg Lines
Baseline, Slants, and Stilts
Subject and verb sit on a horizontal baseline with a vertical line between them. Direct objects use a vertical line that does not cross the baseline. Modifiers slant diagonally under their target word. Subordinate clauses go on a stilt — exactly the geometry English grammar textbooks have used since 1877.
Start free, upgrade when the worksheet packet grows
Every account gets free credits on sign-up. Need more Reed-Kellogg diagrams for a unit, a full semester of grammar warm-ups, or a paid teacher resource? Pick a plan that fits the size of your workload.
Student or teacher? Apply for an education discount
How English and ESL Teachers Actually Use It
Feedback from K-12 grammar teachers, ESL instructors, classical homeschool parents, and middle-school students who used to draw every Reed-Kellogg diagram by hand.
Rebecca Whitfield
7th Grade ELA Teacher, Asheville, NCI run a 'Diagram of the Day' warm-up. Drawing each one by hand was taking 25 minutes a sentence. Now I generate the labeled version for the projector and a blank worksheet for the students in two clicks.
Mateo Reyes
9th Grader, Sacramento, CAMy English teacher gives us five Reed-Kellogg sentences a week. I used to fight with pencil lines on graph paper. Now I diagram each sentence first, then redraw it neatly knowing where everything goes.
Sister Catherine Walsh
Classical Homeschool Parent, Pittsburgh, PAWe follow the Memoria Press grammar program. The sentence diagram generator handles every sentence type in the curriculum and matches the textbook conventions — so my answer keys look exactly like the back of the book.
Rebecca Whitfield
7th Grade ELA Teacher, Asheville, NCI run a 'Diagram of the Day' warm-up. Drawing each one by hand was taking 25 minutes a sentence. Now I generate the labeled version for the projector and a blank worksheet for the students in two clicks.
Mateo Reyes
9th Grader, Sacramento, CAMy English teacher gives us five Reed-Kellogg sentences a week. I used to fight with pencil lines on graph paper. Now I diagram each sentence first, then redraw it neatly knowing where everything goes.
Sister Catherine Walsh
Classical Homeschool Parent, Pittsburgh, PAWe follow the Memoria Press grammar program. The sentence diagram generator handles every sentence type in the curriculum and matches the textbook conventions — so my answer keys look exactly like the back of the book.
Rebecca Whitfield
7th Grade ELA Teacher, Asheville, NCI run a 'Diagram of the Day' warm-up. Drawing each one by hand was taking 25 minutes a sentence. Now I generate the labeled version for the projector and a blank worksheet for the students in two clicks.
Mateo Reyes
9th Grader, Sacramento, CAMy English teacher gives us five Reed-Kellogg sentences a week. I used to fight with pencil lines on graph paper. Now I diagram each sentence first, then redraw it neatly knowing where everything goes.
Sister Catherine Walsh
Classical Homeschool Parent, Pittsburgh, PAWe follow the Memoria Press grammar program. The sentence diagram generator handles every sentence type in the curriculum and matches the textbook conventions — so my answer keys look exactly like the back of the book.
Rebecca Whitfield
7th Grade ELA Teacher, Asheville, NCI run a 'Diagram of the Day' warm-up. Drawing each one by hand was taking 25 minutes a sentence. Now I generate the labeled version for the projector and a blank worksheet for the students in two clicks.
Mateo Reyes
9th Grader, Sacramento, CAMy English teacher gives us five Reed-Kellogg sentences a week. I used to fight with pencil lines on graph paper. Now I diagram each sentence first, then redraw it neatly knowing where everything goes.
Sister Catherine Walsh
Classical Homeschool Parent, Pittsburgh, PAWe follow the Memoria Press grammar program. The sentence diagram generator handles every sentence type in the curriculum and matches the textbook conventions — so my answer keys look exactly like the back of the book.
Sentence Diagram Generator — Common Questions
FAQ
Your First Sentence Diagram, Free
Paste any English sentence. Get a Reed-Kellogg diagram with subject, verb, modifiers, and clauses in 30 seconds. No graph paper, no protractor, no credit card.
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One subscription unlocks every Vizcept AI diagram tool — from free body diagrams and syntax trees to biology diagrams and more.
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