Browse all 200 online utilities categorized and ordered alphabetically for fast access.
Estimate token counts for AI prompts across GPT-4, Claude, Llama 3, DeepSeek, and BPE tokenizers with cost previews.
Compute convolutional and pooling layer output spatial dimensions based on input size, kernel size, stride, and padding.
Generate interactive 2x2 confusion matrix visualizations with precision, recall, specificity, accuracy, and F1-scores.
Compare learning rate schedules including Constant, Step Decay, Exponential Decay, and Linear Decay across training epochs.
Analyze class distributions, calculate class percentages, majority/minority ratios, and assess dataset class imbalance.
Calculate MAE, MSE, RMSE, R² score, and MAPE metrics to evaluate regression model performance.
Calculate trainable parameters (weights and biases) and memory footprint for Dense and Convolutional neural network layers.
Convert categorical variable lists into one-hot binary matrices and export to CSV, JSON, or Python Pandas code.
Analyze AI prompt length, word count, token estimates, section structure, template variables, and instructions.
Calculate dataset row allocations and percentage splits for training, validation, and testing sets in ML pipelines.
Solve linear equations, systems of linear equations, and quadratic equations with real and complex roots.
Add, subtract, multiply, and divide proper, improper, and mixed fractions with step-by-step simplification.
Calculate your semester GPA and cumulative CGPA with customizable credit units and grading systems.
Perform matrix addition, subtraction, multiplication, determinant, transpose, and inverse operations.
Convert numbers between Binary (Base 2), Octal (Base 8), Decimal (Base 10), and Hexadecimal (Base 16).
Compute percentage increases, decreases, percentage of values, and percentage differences effortlessly.
Full-featured online scientific calculator with trigonometric, logarithmic, exponential, and memory operations.
Compute mean, median, mode, variance, standard deviation, range, and interquartile range for datasets.
Boost academic focus with customizable Pomodoro study intervals, short/long breaks, and audio alerts.
Convert length, mass, volume, temperature, speed, area, time, and digital storage units accurately.
Calculate vector addition, dot product, cross product, magnitude, unit vector normalization, and angle between vectors.
Perform matrix addition, subtraction, multiplication, transpose, determinant, inverse, and rank calculations up to 3x3/4x4.
Calculate nth term, sum of n terms, common difference, and common ratio for arithmetic and geometric progressions.
Perform complex number arithmetic (a + bi) including addition, multiplication, division, magnitude, argument, and conjugate.
Approximate first and second derivatives using Forward, Backward, and Central Finite Difference methods.
Approximate definite integrals using the Trapezoidal Rule and Simpson's 1/3 Rule with subinterval steps.
Compute n!, nPr permutations, and nCr combinations with step-by-step mathematical explanations.
Evaluate, add, subtract, multiply polynomials and compute symbolic derivatives for algebraic expressions.
Solve quadratic equations (ax² + bx + c = 0) with real or complex roots, discriminant, and parabola vertex coordinates.
Solve systems of 2x2 and 3x3 linear equations using Cramer's rule with system determinant analysis.
Analyze time complexity O(1), O(log N), O(N), O(N log N), O(N^2) and space complexity for algorithms.
Perform binary addition, subtraction, multiplication, and division with bitwise results.
Simplify Boolean algebra expressions using De Morgan's laws and digital logic identities.
Calculate clock frequency (GHz/MHz), clock period (ns/ps), clock cycle count, and total execution time.
Calculate CPU execution time, instruction count, cycles per instruction (CPI), MIPS, and clock frequency.
Interactive simulator for AND, OR, NOT, NAND, NOR, XOR, and XNOR digital logic gates with truth tables.
Calculate usable array capacity, fault tolerance, and efficiency for RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10.
Calculate required RAM memory for arrays, 2D/3D data structures, uncompressed image buffers, and audio/video frames.
Calculate usable operating system storage from decimal drive capacities (GB/TB) to binary values (GiB/TiB).
Generate complete digital logic truth tables for multi-variable Boolean expressions.
Calculate network address, broadcast address, subnet mask, usable host range, and host count from CIDR notation.
Calculate text and payload checksums including CRC32, MD5, and SHA family digests.
Lookup public DomainKeys Identified Mail (DKIM) records by domain and selector.
Analyze a domain's DMARC record to inspect policy enforcement (none, quarantine, reject) and alignment settings.
Query public DNS records (A, AAAA, MX, TXT, NS, CNAME, CAA) to inspect security configurations.
Analyze text strings to identify encoding formats including Base64, Hexadecimal, URL Encoding, and HTML entities.
Upload or drag-and-drop a local file to compute MD5, SHA-1, SHA-256, and SHA-512 hashes client-side.
Inspect an authorized website's HTTP response headers to identify missing security policies like CSP, HSTS, and X-Frame-Options.
Display publicly available IPv4/IPv6 address classification, reverse DNS, and basic network info.
Generate highly memorable, multi-word passphrases with custom separators and capitalization.
Generate strong, random, secure passwords with customizable length, symbols, numbers, and uppercase/lowercase rules.
Analyze password length, character diversity, entropy bits, and common dictionary weaknesses.
Search common TCP/UDP port numbers and display their standard assigned services and protocols.
Inspect a domain's Sender Policy Framework (SPF) TXT record and break down its mechanisms.
Inspect public SSL/TLS certificates for domain issuer, expiration date, SANs, and TLS protocol details.
Generate recommended HTTP security header configurations for Apache (.htaccess), Nginx, and PHP applications.
Generate configurable password policy documentation and enforcement standards for organizations.
Generate hardening checklists for PHP sites, Linux servers, Windows, APIs, Databases, WordPress, and Cloud.
Calculate subnet divisions from an IP address and required number of subnets or hosts per subnet.
Analyze a URL for HTTPS usage, suspicious encoding, unusual ports, deceptive domain structures, and risk factors.
Analyze CSV text or uploads to inspect row count, column names, data types, and preview tables.
Calculate Accuracy, Precision, Recall, Sensitivity, Specificity, and F1-Score metrics.
Input True Positives (TP), True Negatives (TN), False Positives (FP), and False Negatives (FN) for model evaluation.
Generate summary statistics, memory footprint, and categorical vs numerical column breakdowns.
Identify duplicate data rows and calculate percentage duplication across tabular datasets.
Compare Min-Max vs Robust Scaling vs MaxAbs scaling side-by-side.
Calculate Gaussian Normal Distribution Probability Density Function (PDF) and Cumulative Distribution Function (CDF).
Identify statistical outliers using the 1.5x Interquartile Range (IQR) rule.
Calculate Shannon Information Entropy H(X) in bits for probability distributions.
Calculate Decision Tree Information Gain IG(T, a) = H(T) - H(T|a).
Calculate linear regression equation (y = mx + c), slope (m), y-intercept (c), and R-squared (R^2).
Scale numeric series into range [0, 1] using Min-Max normalization.
Detect null/empty cells, calculate missing value percentages per column, and recommend imputation strategies.
Calculate Principal Component Analysis (PCA) 2D covariance matrix and explained variance percentages.
Calculate Pearson correlation coefficient (r) between two numeric series.
Calculate event probability P(A), union P(A U B), intersection P(A n B), and conditional probability P(A|B).
Calculate required statistical sample size based on population size, confidence level (95%, 99%), and margin of error.
Calculate row count splits for Machine Learning Train/Validation/Test ratios (e.g. 80/10/10).
Calculate Z-Score from raw value, mean, and standard deviation, with p-value probability lookup.
Standardize dataset values to zero mean and unit variance (Z-score transformation).
Visual schema designer to configure tables, columns, primary/foreign keys, and export DDL SQL or JSON schemas.
Estimate approximate database storage requirements from row counts, column types, row overhead, and index assumptions.
Generate DDL CREATE TABLE definitions with data types, length, primary keys, auto-increment, default values, and unique constraints.
Compare and map data types across MySQL, PostgreSQL, SQLite, and Microsoft SQL Server.
Generate escaped SQL INSERT INTO queries from table names, column names, and row values.
Format SQL statements with readable indentation, uppercase keywords, and clean syntax formatting.
Generate parameterized SQL UPDATE queries with SET assignments and WHERE conditions.
Estimate battery backup duration based on capacity (Ah/Wh), load current/power, and depth of discharge.
Calculate series/parallel total capacitance, stored charge (Q), stored energy (E), and RC time constants (τ).
Compute Single-Phase and Three-Phase AC Power, DC Power, Apparent Power (VA), and Reactive Power (VAR).
Calculate inductive reactance (XL), total series/parallel inductance, and resonant frequency (f0) of LC circuits.
Calculate required current-limiting series resistor values and power ratings for single or arrayed LEDs.
Calculate Voltage (V), Current (I), Resistance (R), and Power (P) instantly using Ohm's Law relationship formulas.
Decode 4-band, 5-band, and 6-band resistor color codes to resistance values, tolerances, and temp coefficients.
Calculate equivalent resistance for multiple resistors connected in series, parallel, or combination configurations.
Determine output voltage, resistor ratios, or missing resistance values in loaded and unloaded voltage divider circuits.
Select correct AWG wire gauges and calculate voltage drop across copper and aluminum conductors.
Convert between RMS voltage, Peak voltage, Peak-to-Peak voltage, and Average voltage for sine, square, and triangle waves.
Calculate Q-point operating parameters (Vb, Ve, Vc, Ic, Vce) for BJT voltage divider bias and fixed bias configurations.
Calculate decibel (dB) voltage ratios (20 log) and power ratios (10 log) for gain and attenuation measurements.
Calculate series current-limiting resistor, diode forward power dissipation, and voltage drop for rectifier and signal diodes.
Calculate electromagnetic wavelength λ = c/f and period T from frequency with conductor velocity factor adjustments.
Estimate required heat sink thermal resistance θ_SA (°C/W) and junction temperature from power dissipation and ambient temp.
Calculate closed-loop gain and output voltage for ideal inverting, non-inverting, follower, and differential op-amp circuits.
Calculate RC time constant (τ = R·C) and capacitor charge/discharge percentages at specified time intervals.
Calculate resonant frequency f = 1/(2π√LC), inductive/capacitive reactances, Q-factor, and bandwidth for RLC circuits.
Calculate transformer relationships between primary/secondary voltages, turns count (Np:Ns), currents, and VA power rating.
Calculate energy in Watt-Hours (Wh) and Kilowatt-Hours (kWh) from battery Voltage and Amp-Hours (Ah).
Calculate total equivalent capacitance for capacitors in series and parallel configurations.
Calculate complex resistor networks using combinations of series and parallel branches.
Calculate power supply requirements from voltage, current, total wattage, and efficiency ratings.
Calculate required inverter continuous capacity (VA/W) and surge rating based on connected appliances.
Calculate timer register match values (OCR) for AVR/Arduino, STM32, and PIC microcontrollers.
Calculate frequency, duty cycle, period (T), and active pulse width (T_on) for Arduino and ESP32 microcontrollers.
Estimate required solar PV wattage and panel counts from daily energy usage (kWh/day) and peak sun hours.
Calculate serial communication parameters, bit period (1/baud), and transfer speeds for standard baud rates.
Create cron schedules visually with interactive pickers, preset schedules, human-readable explanations, and run estimates.
Generate .env configuration templates for Node.js, Laravel, Django, PostgreSQL, Redis, Docker, and Next.js.
Enter permission strings like -rwxr-xr-- or drwxr-xr-x to break down file type, owner, group, others, and special bit access.
Search common Linux commands categorized by Files, Networking, Processes, Users, Permissions, Packages, Services, and Storage.
Calculate disk usage and convert between KB/MB/GB/TB (decimal 1000) and KiB/MiB/GiB/TiB (binary 1024) units.
Analyze file paths to identify absolute vs relative status, dirname, basename, file extension, parent directory, and normalized path.
Convert octal (755, 644, 700) and symbolic (rwxr-xr-x) permissions with interactive checkboxes for Owner, Group, Others, Setuid, Setgid, Sticky bit.
Generate systemd .service unit files with configurable ExecStart, User, WorkingDirectory, Restart policy, and Environment variables.
Calculate surface area and volume for 2D plane shapes (circles, triangles) and 3D solids (spheres, cylinders, cones).
Calculate maximum bending moment, shear forces, and deflection for simply supported and cantilever structural beams.
Specialized engineering unit converter for pressure, stress (MPa/psi), dynamic/kinematic viscosity, energy, and flow rates.
Compute force using Newton's Second Law (F=ma), gravitational force, spring force (Hooke's Law), and centripetal force.
Calculate gear speed ratios, output RPM, mechanical torque multiplication, and gear train reductions.
Calculate total weight and volume of metal plates, round bars, tubes, and sheets (Steel, Aluminum, Copper, Brass).
Compute electric, hydraulic, and mechanical motor power requirements in kilowatts (kW) and horsepower (HP).
Calculate mechanical pressure (P=F/A), hydrostatic pressure in fluids, and convert between pressure units.
Convert between linear surface speed (m/s, ft/min) and rotational speed (RPM) for wheels, pulleys, and spindles.
Calculate rotational force / torque (τ = F × r) and convert between torque, mechanical power, and RPM.
Search and learn explanations, syntax, and TTL recommendations for A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, and SRV records.
Estimate download and upload duration based on file size, connection speed, and TCP/IP overhead allowance.
Search and explore explanations, example syntax, and security impacts for common HTTP request and response headers.
Enter any HTTP status code (200, 301, 401, 403, 404, 500, 502, 503) to inspect meaning, causes, and fix steps.
Display IPv4/IPv6 binary representation, netmask, wildcard mask, broadcast, host range, and address class.
Convert IPv4 addresses to IPv4-mapped IPv6, 6to4 prefix, decimal integer, hex, and explain IPv6 compression.
Convert MAC addresses between colon (AA:BB:CC:DD:EE:FF), hyphen (AA-BB-CC-DD-EE-FF), and Cisco dot (AABB.CCDD.EEFF) formats.
Validate MAC address syntax, check unicast vs multicast, local vs universal administration, and OUI vendor prefix.
Calculate transfer time, required bandwidth, and data volume across Mbps, Gbps, MB/s, and GB/s.
Calculate approximate propagation delay, transmission delay, and RTT (Round Trip Time) across medium distances.
Generate all subnet ranges from a specified parent CIDR block into smaller target subnets with reasonable output limits.
Calculate daily and monthly energy consumption (kWh) and operating cost for household appliances like fans, fridges, and ACs.
Calculate resulting total voltage (V), capacity (Ah), and total energy (Wh/kWh) for battery banks in series or parallel.
Calculate voltage drop (Volts & %) over distance for copper or aluminum cables in AC/DC solar and mains installations.
Calculate daily, monthly, and annual electricity costs based on device wattage, hours of usage, and custom energy tariff rate.
Estimate total fuel volume, operating cost, and fuel cost per kWh for diesel or gasoline power generators.
Estimate inverter backup runtime from battery Ah, voltage, load wattage, depth of discharge, and inverter efficiency.
Calculate Power Factor (PF = kW / kVA), reactive power (kVAR), apparent power, and required capacitor kVAR correction.
Calculate required battery bank capacity (Ah & kWh) from load power, backup hours, system voltage, and depth of discharge.
Calculate recommended MPPT or PWM charge controller current rating (Amps) from solar array wattage and battery voltage.
Estimate required solar panel array wattage and panel count from daily energy usage (Wh/day) and peak sun hours.
Convert text strings to and from ASCII values with decimal, hexadecimal, binary, and octal representations.
Convert source code indentation between spaces and tabs with customizable tab widths (2, 4, or 8 spaces).
Generate production-ready .env configuration templates for Laravel, Node.js, Next.js, WordPress, Django, and Flask without storing secrets.
Convert strings between escaped and unescaped formats for JSON, HTML, URL, JavaScript, and SQL strings.
Generate and explain common regular expressions for emails, URLs, phone numbers, IP addresses, dates, and password rules.
Analyze source code snippets and estimate the likely programming language based on syntax structure, keywords, and structural patterns.
Analyze source code snippets to calculate total lines, code lines, comment lines, blank lines, and comment ratios across PHP, JS, Python, C/C++, Java, and Go.
Analyze text strings to calculate character count, byte length, word count, line count, digit count, and whitespace stats.
Compare two code or text snippets side-by-side and highlight added, removed, and modified lines in real time.
Search Unicode characters by character, code point (U+XXXX), or official name, with HTML entity and UTF-8 byte outputs.
Calculate filament length, filament mass (PLA/ABS/PETG), material cost, layer height measurements, and estimated print duration.
Calculate CNC feed rate (mm/min), spindle RPM, chip load per tooth, and number of flutes for machining and PCB milling.
Calculate RPM, angular velocity (rad/s), linear velocity, gear ratio reductions, and motor voltage relationships.
Calculate RC servo positioning angle (0° to 180°) and PWM pulse width (1000µs to 2000µs) or duty cycle relationships.
Calculate steps/revolution, microstepping, steps/mm for lead screws or GT2 belts, and travel distance for 3D printers and CNCs.
Encode plain text into Base64 format and decode Base64 strings back to readable plain text.
Convert HTML characters to named or numeric entities and decode HTML entities safely.
Generate cryptographic hashes including MD5, SHA-1, SHA-256, SHA-384, SHA-512, and CRC32.
Format, beautify, inspect tree structures, and compact JSON strings with instant syntax highlighting.
Validate JSON structure and syntax with line-by-line error positioning and detailed diagnostics.
Decode JSON Web Tokens (JWT) to inspect Header, Payload, Claims, Expiration date, and Signature structure.
Test regular expressions against target strings with real-time match highlighting and capture group breakdowns.
Encode special characters for URL parameters (percent-encoding) and decode encoded URLs.
Generate single or bulk Version 4 (Random) and Version 1 (Time-based) UUIDs/GUIDs.
Convert Epoch Unix timestamps to human-readable date/time formats and convert human dates to epoch timestamps.
Build HTTP API requests (GET, POST, PUT, PATCH, DELETE) with headers, query parameters, and JSON payload.
Visual cron schedule builder generating Linux cron syntax and human-readable explanations.
Parse any Linux crontab expression and receive a clear human-readable schedule summary.
Analyze file extensions for MIME type, typical applications, content category, and security considerations.
Search 1xx, 2xx, 3xx, 4xx, and 5xx HTTP status codes with descriptions and common causes.
Search file extensions (.pdf, .json, .png, .csv) to return official MIME content-type strings.
Search and compare SQL data types (INT, VARCHAR, TEXT, DECIMAL, DATETIME, BLOB) across MySQL, PostgreSQL, and SQLite.
Format, indent, and capitalize SQL queries for MySQL, PostgreSQL, SQLite, and SQL Server.
Compare software versions (e.g. 1.4.2 vs 1.10.0), analyze Major/Minor/Patch diffs, and check SemVer compatibility.
Visual UI for building SELECT, INSERT, UPDATE, and DELETE SQL queries.
Design custom CSS box shadows with interactive controls for offset, blur, spread, opacity, and inset/outset.
Format CSS code with clean indentation or compress/minify CSS stylesheets to reduce file sizes.
Create beautiful linear and radial CSS background gradients with customizable color stops and live CSS output.
Convert colors between HEX, RGB, RGBA, HSL, HSLA, and CMYK with a live color picker and palette generator.
Format, indent, and beautify HTML code markup or minify HTML for optimized web page performance.
Beautify unformatted JavaScript or minify JS scripts for production deployment.
Generate dummy placeholder text in paragraphs, sentences, words, or lists for web and print design mockups.
Generate SEO meta tags, OpenGraph tags for Facebook, and Twitter Cards with real-time social search preview.
Generate customizable QR codes for text, URLs, WiFi credentials, email, and contact cards with PNG/SVG downloads.
Convert article titles and raw strings into clean, SEO-friendly, URL slugs with special character removal.