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Fast, focused utilities built for real workflows — no fluff, no sign-ups, no limits.
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A growing library covering text, code, math, images, and more.
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Fresh additions
Recently Added
The latest tools added to our collection
Slant Height Calculator
Calculate the slant height, vertical height, radius/base, and apex angle for right circular cones, regular pyramids, and 2D slopes with step-by-step math.
Singular Values Calculator
Calculate singular values of 2x2, 2x3, 3x2, and 3x3 matrices with step-by-step matrix multiplication, eigenvalues of AᵀA, condition number, and matrix norms.
Similar Triangles Calculator
Check if two triangles are similar using SSS, SAS, or AA similarity theorems, find missing side lengths, scale factors, perimeter, and area with step-by-step math.
Semicircle Area Calculator
Calculate semicircle area, perimeter, arc length, radius, diameter, and centroid height instantly from any known measurement with step-by-step math.
Segment Addition Postulate Calculator
Calculate line segment lengths AB, BC, and total length AC using the Segment Addition Postulate, solve algebraic segment equations, and check collinearity.
Secant Calculator
Calculate the secant function sec(x) for any angle in degrees, radians, or multiples of pi with exact values, reciprocal relations, and step-by-step trigonometry.
Scalene Triangle Calculator
Calculate scalene triangle side lengths, angles, area, perimeter, altitudes, inradius, and circumradius with step-by-step geometry formulas.
RSA Calculator
Calculate RSA keys step-by-step from primes p and q, find modular inverses, and encrypt or decrypt numbers and text messages.
Row Echelon Form Calculator
Convert matrices to Row Echelon Form (REF) and Reduced Row Echelon Form (RREF) using Gaussian elimination with step-by-step row operations.
Rotation Calculator
Calculate 2D point rotation around origin or custom center point online with rotation matrix and interactive coordinate plot.
Root Mean Square Calculator
Calculate root mean square (RMS) or quadratic mean for datasets and AC waveforms online with step-by-step math.
Right Trapezoid Calculator
Calculate area, perimeter, slant leg, height, diagonals, and angles of a right trapezoid online with instant step-by-step math.
Relatively Prime Calculator
Check if numbers are relatively prime (coprime), compute greatest common divisor (GCD), prime factorizations, and Euler's totient function step-by-step.
Reference Angle Calculator
Calculate reference angles in degrees and radians, identify quadrants, positive coterminal angles, and trigonometric values with interactive unit circle.
Rectangular Pyramid Volume Calculator
Calculate the volume, surface area, base area, lateral area, and slant heights of a rectangular pyramid with 3D visualization and step-by-step math.
Rectangle Scale Factor Calculator
Calculate linear scale factor, area scale factor, and scaled rectangle dimensions with real-time geometric visualization and step-by-step math.
Rectangle Diagonal Angle Calculator
Calculate the angle between rectangle diagonals and sides, diagonal length, perimeter, and area with 2D diagram.
Reciprocal Calculator
Find the reciprocal (multiplicative inverse) of any decimal, integer, fraction, or mixed number with step-by-step math.
Ratios of Directed Line Segments Calculator
Find internal and external division points on a directed line segment using ratio m:n with step-by-step section formula calculations.
Ratio of 3 Numbers Calculator
Simplify three-number ratios, solve 3-part proportions, scale ratios, and divide amounts into ratio parts step-by-step.
Rational Zeros Calculator
Find all possible candidate roots using the Rational Root Theorem and test actual rational zeros of polynomials with step-by-step breakdown.
Rational Exponents Calculator
Convert and evaluate numbers with rational exponents (fractional powers), radical form, and step-by-step simplification.
Queueing Theory Calculator
Calculate queue lengths, waiting times, server utilization, and traffic intensity for M/M/1 and M/M/c queueing models.
Quaternion Calculator
Perform quaternion addition, subtraction, Hamilton multiplication, division, norm, inverse, and 3D vector rotation online.
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39 tools
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45 tools
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23 tools
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442 tools
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Name Generators
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25 tools
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18 tools
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70 tools
PDF & Document Tools
3 tools
Physics & Chemistry
170 tools
QR & Barcode Tools
6 tools
Random Generators
59 tools
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50 tools
Social Media Tools
25 tools
Statistics & Data Analysis
131 tools
Text Editors & Viewers
6 tools
Text Processing
101 tools
Time & Date
159 tools
Travel & Automotive
50 tools
Unicode Tools
43 tools
Unit Converters
180 tools
Utilities
45 tools
Weather & Environment
6 tools
Web & SEO Tools
23 tools
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On the roadmap
Coming Soon
New mini-tools we're building next.
Html to Jsx
Convert HTML file to JSX online
Instagram Reel Downloader
Download and save Instagram videos locally with our Instagram Reel Downloader. No signup required.
Instagram Reel Thumbnail Downloader
Save thumbnails from any reel
Always free
No subscriptions, credits, or paywalls. Every tool on the site is free to use.
Privacy first
Processing happens client-side whenever possible. Your data never leaves your browser.
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From the blog
Latest Blog Posts
Tips, guides, and insights from our team
How to Download a Website Favicon (Free Online Method)
Download any website's favicon in PNG or ICO format. Step-by-step guide for developers and designers using a free favicon downloader.
JWT Token Decoding Explained: How to Read JWT Payloads Safely
Learn how JWT tokens work, what header and payload contain, and how to decode JWT online without exposing secrets. Free JWT decoder guide.
How to Take a Screenshot in Your Browser (Free Tool Guide)
Capture full pages or visible areas in your browser without extensions. Step-by-step guide to our free online screenshot tool.
Stock Splits Explained: What They Are, How They Work, and How to Calculate New Shares
Understand forward and reverse stock splits, how to calculate new shares, cost basis adjustments, and why companies split stock. Free split calculator included.
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