AI Writing, Grammar & Readability Checkers

Evaluate reading difficulty, word usage density, and edit drafts.

All Tools

Choose from our collection of free, accurate tools

Tone Detector

7 Ways a Tone Detector Can Transform How Engineers Communicate Engineers are trained to be precise about numb…

Use Tool →

Headline Analyzer

What Exactly Is a Headline Analyzer, and Why Should I Care? A Headline Analyzer is an online scoring tool tha…

Use Tool →

Readability Score Checker

The Readability Score Checker: Separating Engineering Fact from Fiction Engineers and scientists are trained …

Use Tool →

Article Spinner

What Article Spinners Actually Do Under the Hood An article spinner is a text-rewriting tool that takes a sou…

Use Tool →

Essay Title Generator

What Even Is an Essay Title Generator, and Why Should Engineers and Scientists Care? Picture this: you just s…

Use Tool →

Text Summarizer

The Algorithm That Reads So You Don't Have To There is a particular kind of dread that settles over researche…

Use Tool →

Plagiarism Checker

When My Thesis Advisor Said "This Reads Like Wikipedia" — How a Plagiarism Checker Changed My Research Habits…

Use Tool →

Paragraph Generator

Paragraph Generator vs. Writing From Scratch: An Engineer's Honest Take When you spend most of your day worki…

Use Tool →

Sentence Rewriter

When Your Technical Writing Gets in the Way of Your Technical Ideas Here is a scenario that plays out in engi…

Use Tool →

Grammar Checker

How to Use a Grammar Checker to Write Cleaner Technical and Scientific Documents If you have ever submitted a…

Use Tool →
🌀

Reynolds Number Calculator

Instantly compute the Reynolds number from fluid velocity, density, dynamic viscosity, and characteristic len…

Use Tool →
🚰

Darcy-Weisbach Pipe Pressure Drop Calculator

Calculate friction head loss and pressure drop in a pipe using the Darcy-Weisbach equation with an iterative …

Use Tool →
💨

Bernoulli Equation Flow Calculator

Solve for unknown pressure, velocity, or elevation at either point in a steady, incompressible, inviscid stre…

Use Tool →
🎈

Ideal Gas Law Solver (PV=nRT)

Solve for pressure, volume, temperature, or moles using the Ideal Gas Law (PV=nRT) with automatic unit handli…

Use Tool →
🔥

Heat Conduction Calculator (Fourier's Law)

Calculate conductive heat transfer rate through any wall or slab using Fourier's Law. Enter thermal conductiv…

Use Tool →
📏

Thermal Stress & Expansion Calculator

Calculate linear thermal expansion, thermal strain, and constrained thermal stress instantly. Enter temperatu…

Use Tool →
🏗️

Beam Stress & Deflection Calculator

Calculate maximum bending stress and mid-span deflection for four common beam loading configurations — simply…

Use Tool →
🧲

Young's Modulus & Stress-Strain Calculator

Calculate Young's modulus, stress, strain, or elongation instantly. Enter any three known values — force, cro…

Use Tool →
♻️

Carnot Efficiency Calculator

Calculate the maximum theoretical efficiency of any heat engine using the Carnot formula. Input hot and cold …

Use Tool →
⚙️

Pump Hydraulic Power & NPSH Calculator

Calculate pump hydraulic power, shaft power at a given efficiency, and available NPSH (Net Positive Suction H…

Use Tool →
📐

Pipe Flow Rate & Velocity Calculator

Calculate volumetric flow rate, average velocity, or pipe diameter instantly using the continuity equation — …

Use Tool →
🌡️

LMTD Heat Exchanger Calculator

Calculate the Log-Mean Temperature Difference (LMTD) and required heat-transfer area for counter-flow and par…

Use Tool →

A workbench for people who write to be read

Most of the writing tools on the open web are built for one moment: the panicked minute before a deadline, when you paste a paragraph in, grab a fix, and close the tab. SteinkeTool is put together for the longer relationship a real writer has with their own drafts — the essay that goes through four revisions, the blog post that has to hold a reader for six minutes, the thesis chapter your supervisor will annotate line by line. That is why the grammar checker, readability score checker, sentence rewriter, plagiarism checker, tone detector and headline analyzer here all live in one place and speak the same language. You are not meant to bounce between five sites; you are meant to move a single piece of writing through a sequence of honest checks until it reads the way you meant it to.

Everything runs free in the browser. There is no word cap that quietly appears at 300 characters, no export button that turns into a paywall, and no account gate between you and a grammar pass at 1 a.m. Students, bloggers and content writers were the audience we kept in front of us while building each tool, because those three groups share the same real problem: they produce a lot of words on a schedule, and they rarely have an editor sitting next to them. These tools are meant to be that second reader — the calm one who points at the sentence that runs too long and says nothing about your worth as a person.

How the tools fit a real drafting order

The trick to using a toolkit like this well is to stop treating each tool as a separate errand and start treating them as stations on an assembly line. When you finish a rough draft, resist the urge to grammar-check first. Begin with the Text Summarizer: paste your own piece and read the summary it produces. If that summary does not match the point you thought you were making, no comma fix will save the draft — you have a structure problem, and it is cheaper to solve now. Once the shape is right, run the Readability Score Checker. It reports the grade level and sentence-length patterns of your text, and for blog and student work you usually want to land a notch or two below where you naturally write, because clarity almost always beats sophistication for a reader who is skimming on a phone.

With the structure settled and the reading level in a sane range, move to the sentence layer. The Sentence Rewriter is for the lines you flagged during your own read-through — the ones that are technically fine but land flat. Feed it a clumsy sentence, look at the alternatives, and keep the phrasing that sounds like you rather than the one that sounds like a press release. The Article Spinner and Paragraph Generator sit nearby for when you are stuck staring at a blank section and need a running start, but treat their output as clay, not as finished pottery. Only after the words are close to final do you bring in the Grammar Checker, because polishing punctuation on sentences you are about to delete is a way of feeling productive without being productive.

Reading level, tone and headlines: the parts writers skip

Grammar is the easy part to worry about because it feels objective — a comma is either there or it is not. The harder, more valuable work happens in the tools writers tend to ignore. The Tone Detector reads your draft and tells you whether it comes across as formal, casual, confident, tentative or somewhere in between. That matters more than most people admit: a cover letter that reads as breezy, or a heartfelt personal essay that reads as a corporate memo, fails long before anyone notices a typo. Run it on a paragraph you are unsure about, and if the tone it reports is not the tone you intended, you have found a problem worth fixing before publication rather than after.

Headlines and titles deserve the same deliberate attention, which is why the Headline Analyzer and Essay Title Generator earn their place. For bloggers, the headline is doing roughly half the work of the whole post — it decides whether the article is opened at all — so it is worth testing several versions for length, word balance and emotional pull rather than shipping the first phrase that came to mind. Students face the quieter version of the same task: a sharp essay title signals to a marker that you understood the assignment and had a point of view. The generator is there to break you out of the generic "An Analysis Of…" rut and give you a few angles to react against, even if you end up writing your own.

Honest limits, and how to keep your own judgment

It would be easy to promise that these tools make your writing perfect. They do not, and any writing site that promises that is selling you something. A grammar checker catches patterns; it does not know that you broke a rule on purpose for rhythm. A readability score rewards short sentences, but some ideas genuinely need a long, carefully built sentence to hold their parts together, and blindly chopping everything to hit a number produces prose that reads like a series of text messages. The plagiarism checker is a safety net for accidental overlap and forgotten citations — a genuinely useful thing when you have been reading twenty sources — but it is not a substitute for keeping track of where your ideas came from as you research.

Use every result here as a prompt for your own thinking, not as a verdict to obey. When the tone detector surprises you, ask why. When the rewriter offers a smoother line, check whether "smoother" also means "blander." The writers who get the most out of a toolkit like this are the ones who stay in the driver's seat — who let the tools flag the spots worth a second look and then make the final call themselves. That is the whole idea behind gathering these particular tools under one roof: not to write for you, but to give you a reliable, patient second pair of eyes so that the finished piece sounds unmistakably like the person who wrote it.

Grammar Lab at a Glance

Quick

From input to answer in seconds, every time.

🙌

Free Forever

Open the page and start — no cost, no catch.

📐

Precise

Careful math and methods behind every tool.

📲

Mobile-Ready

Optimized for the phone in your pocket.

Latest from Our Blog