Paste an English sentence and the AI draws a labeled Reed-Kellogg sentence diagram β subject, verb, direct object, modifiers, prepositional phrases, and subordinate clauses all on the right lines, ready for grammar class, ELA worksheets, and homeschool review.
Attach a sketch or an existing image (JPG/PNG/WEBP, up to 10MB)
Free trial: 5 credits, 2K resolution with watermark
Enter a sentence on the left to diagram your own
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 β for English, ELA, ESL, and homeschool grammar lessons.
Drop in a simple, compound, complex, or compound-complex sentence β 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.
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 β preserving the original wording at every step.
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.
ELA Teachers Β· Homeschool Parents Β· 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 β without spending a planning period on a single diagram.
Middle school, high school, and college English
You can identify the subject and verb in your head β 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.
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 β from the same sentence, in one click.
Classical education and one-on-one tutoring
Classical curricula like Shurley, Easy Grammar, and Analytical Grammar rely on sentence diagramming β 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.
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.
Subject, verb, direct object, and adjective modifier
Two independent clauses joined by 'and'
Relative pronoun 'that' linking a subordinate clause
Adverbial clause introduced by 'because'
Question rearranged to declarative order on the baseline
Unlabeled diagram for student practice
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 β and keeps the original sentence wording on every line.
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 β exactly the geometry English grammar textbooks have used since 1877.
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
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
FAQ
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.
No Paraphrasing, No Token Loss
Type 'My grandmother bakes apple pies for the neighbors' and the diagram shows the words 'grandmother', 'bakes', 'pies', 'apple', 'for', and 'neighbors' on the correct lines. The sentence diagram generator never rewrites your sentence to fit the picture.
Up to ~40 Words
Handles every sentence type covered in K-12 ELA and college composition: simple SVO, compound sentences with FANBOYS conjunctions, complex sentences with subordinate or relative clauses, and compound-complex sentences. Questions are rearranged to declarative order on the baseline.
Answer Key and Worksheet
Generate the labeled version for your slide deck and the blank version for student practice β from the same sentence. Add 'blank worksheet' or 'parts of speech labels' to the prompt and the sentence diagrammer adjusts the output without you redrawing anything.
Helpful for ESL and Visual Learners
Ask for color coding and nouns, verbs, adjectives, adverbs, prepositions, and conjunctions each get a distinct color. Useful for ESL learners building grammar vocabulary, visual learners, and ADHD-friendly classroom resources.
For Worksheets, Slides, and Print
Download as a 4K PNG for handouts, a print-ready PDF for classroom packets, or a transparent PNG to drop into Google Slides, Canva, Notion, or a teacher's pay-teacher product. Free plan exports a 2K version with a small watermark.
We follow the Memoria Press grammar program. The sentence diagram generator handles every sentence type in the curriculum and matches the textbook conventions β 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 β 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 β 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 β so my answer keys look exactly like the back of the book.
Hannah Lin
ESL Instructor, International School ShanghaiMy intermediate ESL learners struggle with English word order. The color-coded part-of-speech diagrams make the subject-verb-object structure obvious in a way that bullet-point grammar rules never did.
Dr. Owen Bradshaw
Composition Director, Liberal Arts CollegeOur freshmen come in unable to identify their own sentence subjects. I now hand out Reed-Kellogg diagrams of their own thesis statements. The structural problems show up visually, and revisions follow.
Priya Anand
Grammar Tutor, Bay AreaI tutor students on writing-section SAT and ACT prep. Generating a quick sentence diagram during a session helps them see the difference between a misplaced modifier and a normal adjective. Worth the credits.
Hannah Lin
ESL Instructor, International School ShanghaiMy intermediate ESL learners struggle with English word order. The color-coded part-of-speech diagrams make the subject-verb-object structure obvious in a way that bullet-point grammar rules never did.
Dr. Owen Bradshaw
Composition Director, Liberal Arts CollegeOur freshmen come in unable to identify their own sentence subjects. I now hand out Reed-Kellogg diagrams of their own thesis statements. The structural problems show up visually, and revisions follow.
Priya Anand
Grammar Tutor, Bay AreaI tutor students on writing-section SAT and ACT prep. Generating a quick sentence diagram during a session helps them see the difference between a misplaced modifier and a normal adjective. Worth the credits.
James Whitaker
Special-Education ELA Teacher, Birmingham, UKMy students need visual scaffolding for grammar. The blank-worksheet version of each diagram gives them a structure to fill in β they hit the right line without me redrawing 30 worksheets a week.
Olivia Park
Curriculum Designer, Online Tutoring StartupI built a 40-lesson sentence-diagramming module. Drafting every diagram in Illustrator would have eaten a month. Generating with the sentence diagrammer and cleaning up in SVG took a week.
Father Michael O'Reilly
Classical Education Headmaster, DublinOur school still teaches Latin and English grammar via sentence diagramming. The tool keeps the Reed-Kellogg geometry our older teachers still use β and saves my younger staff from learning to draw it on the whiteboard.
James Whitaker
Special-Education ELA Teacher, Birmingham, UKMy students need visual scaffolding for grammar. The blank-worksheet version of each diagram gives them a structure to fill in β they hit the right line without me redrawing 30 worksheets a week.
Olivia Park
Curriculum Designer, Online Tutoring StartupI built a 40-lesson sentence-diagramming module. Drafting every diagram in Illustrator would have eaten a month. Generating with the sentence diagrammer and cleaning up in SVG took a week.
Father Michael O'Reilly
Classical Education Headmaster, DublinOur school still teaches Latin and English grammar via sentence diagramming. The tool keeps the Reed-Kellogg geometry our older teachers still use β and saves my younger staff from learning to draw it on the whiteboard.
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