Study & YouTube tool
Formula Extractor
The Formula Extractor scans your text for lines that contain equations — anything matching a variable equals expression pattern — and collects them into a clean, numbered list. It is built for students who have formula-dense notes and want the equations in one place.
All scanning happens locally in your browser; your notes never leave your device.
Privacy & data handling
Browser processingThis tool processes your input locally in your browser. Nothing is uploaded to a server or sent to an external service.
Interactive tool
Formula Extractor
Extracted Formulas
7 of 7| # | Formula | Variable (LHS) | Expression (RHS) | Category | Line | Action |
|---|---|---|---|---|---|---|
| 1 | E = mc² | E | mc² | Physics | Line 1 | |
| 2 | F = ma | F | ma | Physics | Line 2 | |
| 3 | v = u + at | v | u + at | Physics | Line 4 | |
| 4 | s = ut + 1/2at² | s | ut + 1/2at² | Other | Line 5 | |
| 5 | KE = 1/2mv² | KE | 1/2mv² | Physics | Line 6 | |
| 6 | p = mv | p | mv | Physics | Line 7 | |
| 7 | F = G*(m1*m2)/r² | F | G*(m1*m2)/r² | Geometry | Line 8 |
• Notation Parsing: The extractor recognizes equality, assignments, and relational expressions across Unicode math scripts (e.g. superscripts, Greek characters, roots).
• Academic Disclaimer: The tool extracts equation patterns directly from provided source material; it does not claim to evaluate or prove mathematical correctness.
• Multi-Format Exports: Export clean equations into Markdown tables, CSV sheets, or plain text cheat sheets.
• 100% In-Browser Privacy: All formula detection and parsing occur locally on your machine without transmitting notes to external servers.
Overview
What does Formula Extractor do?
Paste your notes, textbook excerpts, or problem sheets and the tool finds simple name-equals-value expressions formula pattern like E = mc^2 or A = pi * r^2. Each match is listed once, deduplicated, and numbered so you can copy the whole set for a revision sheet.
The detector looks for the classic shape of a formula: a name or symbol followed by an equals sign and an expression.
Under the hood
How does it work?
The tool scans your text line by line with a pattern that matches a variable name, an equals sign, and the expression that follows it. Lines that match are collected, duplicates are removed, and the first twenty unique formulas are returned in order.
Key features
Features of Formula Extractor
Use cases
When should you use Formula Extractor?
Building a formula sheet
Extract every equation from a semester of notes into one revision list.
Checking your notes
Scan a transcribed lecture to confirm every formula made it into your notes correctly.
Pulling formulas from documents
Collect equations from problem sheets or papers without retyping them.
Step-by-step
How to use Formula Extractor
- Step 1
Paste text containing mathematical formulas.
- Step 2
The tool identifies and extracts each formula.
- Step 3
Copy the extracted formulas.
Real example
Example
Before (input)
Kinetic energy is KE = 0.5 * m * v^2. Momentum: p = m * v. The period of a pendulum: T = 2 * pi * sqrt(L / g).
After (extracted)
Formulas 1. KE = 0.5 * m * v^2 2. p = m * v 3. T = 2 * pi * sqrt(L / g)
Each formula keeps its original text exactly as written.
Technical information
How the details work
The extractor uses a regular expression that captures a variable or name, whitespace, an equals sign, and everything up to the next comma or end of line. Matches are deduplicated with a set and capped at twenty results so the output stays readable.
Privacy & security
Your data stays yours
All processing happens locally in your browser. Your notes are never uploaded or stored.
Local processing — files stay in your browser
- Extraction runs on your device with no network requests.
- Nothing you paste is saved after the tab is closed.
- No account or API key is required.
Limitations
What this tool does not do
- The pattern recognizes the variable = expression shape — equations formatted differently (fractions, matrix notation) may be missed.
- It extracts text; it does not evaluate or verify the formulas.
- Formulas spanning multiple lines are not reassembled.
Frequently asked questions
Common questions about Formula Extractor
What counts as a formula?
Any text matching the pattern name = expression, like KE = 0.5 * m * v^2. The expression runs to the next comma or the end of the line.
Can it solve or verify formulas?
No — it only extracts and lists them. Evaluation is up to you or a calculator.
Why were some equations missed?
Equations not shaped like name = expression — for example display-style fractions or multi-line derivations — do not match the detector's pattern.
Is my content private?
Yes. The scan happens entirely in your browser and nothing is uploaded.
Can I copy the full list?
Yes — use the copy button to grab the numbered list, then paste it into your revision sheet.
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