Premium Developer Utility Suite

Length Converter

Convert between metric and imperial length units (meters, feet, inches, kilometers, miles).

Weight & Mass Converter

Convert weight and mass units (kilograms, pounds, ounces, grams, stones, tons).

Temperature Converter

Convert temperature values between Celsius, Fahrenheit, and Kelvin scales.

Area Converter

Convert surface areas (square meters, square feet, acres, hectares, square kilometers).

Volume Converter

Convert liquid and dry volumes (liters, milliliters, gallons, pints, cups, ounces).

Data Size Converter

Convert storage metrics between decimal (KB, MB, GB) and binary (KiB, MiB, GiB) units.

Speed Converter

Convert speed measurements (meters/second, km/h, mph, knots, feet/second).

Time Converter

Convert time durations (seconds, milliseconds, minutes, hours, days, weeks, years).

Pressure Converter

Convert pressure units (Pascals, Kilopascals, Bar, PSI, Atmospheres, Torr).

Angle Converter

Convert angular units (Degrees, Radians, Gradians, Arcminutes, Arcseconds).

design Utilities

DESIGN

Color Blindness Simulator

Simulate protanopia, deuteranopia, tritanopia, and monochrome vision deficiencies in real-time.

DESIGN

Image to ASCII Art

Convert images to monochrome text-based ASCII art grids.

developer Utilities

Password Generator

Generate secure, random, and custom passwords to protect your online accounts.

JSON Toolkit

Format, minify, and validate JSON data instantly with inline syntax highlighting and error details.

UUID Generator

Generate cryptographically secure UUID v4 (random) and UUID v1 (time-based) in bulk.

Base64 Encode/Decode

Encode and decode text strings or upload files to convert them to Base64 Data URLs locally.

Hash Generator

Calculate MD5, SHA-1, SHA-256, and SHA-512 cryptographic checksums for text or files locally.

Text Case Converter

Convert text case formats between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.

URL Encode/Decode

Encode or decode URL strings and parameters to safely transmit them over the internet.

YAML Formatter & Validator

Format, validate, and convert YAML data to JSON (and vice-versa) instantly.

XML Formatter & Validator

Prettify, validate, and minify XML documents with real-time parser diagnostics.

SQL Formatter

Format your SQL queries across various dialects like PostgreSQL, MySQL, SQLite, and Oracle.

JWT Decoder

Decode JSON Web Tokens (JWT) client-side to inspect headers, payloads, and signatures.

HTML Entities Encoder & Decoder

Encode characters into HTML entities or decode HTML entities back to raw text with multiple format options.

Cron Descriptor & Generator

Parse complex crontab schedule expressions into plain English descriptions.

JSON Schema Generator

Generate a draft-07 JSON Schema structure automatically from a raw JSON input.

Regex Tester & Matcher

Test and match regular expressions in real-time with group extraction and replace helpers.

URL Parser & Query Splitter

Parse protocols, hosts, pathnames, and search parameters from any query URL.

Unix Epoch Timestamp Converter

Convert Unix seconds or milliseconds to human-readable date strings and vice versa.

JSON ↔ YAML Converter

Convert JSON strings to clean YAML configuration structures and vice versa.

User Agent Parser

Parse User Agent strings to identify client browsers, operating systems, and device types.

Hex ↔ String Codec

Encode text strings into hexadecimal format or decode hexadecimal representations back to plain text.

Meta Tag Generator

Generate optimized meta tags for Google search, Facebook OpenGraph, and Twitter Cards.

Robots.txt Generator

Generate customized robots.txt files to manage search engine crawl instructions.

Sitemap Generator

Generate search console XML sitemaps to index pages index lists.

Schema Markup Generator

Create Article, FAQ, and Breadcrumb structured schemas in JSON-LD formats.

Keyword Density Checker

Check keyword usage percentages and test readability levels of copy drafts.

UTM Campaign Builder

Append Google Analytics UTM campaign source and medium tags to marketing links.

AES Encryption & Decryption

Encrypt and decrypt plaintext strings using 256-bit AES-GCM and PBKDF2 locally.

RSA & ECDSA Key Generator

Generate asymmetric public and private keys in PEM format files.

NanoID & ULID Generator

Generate standard NanoID keys, ULID timestamps, and API tokens.

HMAC & CRC-32 Generator

Generate HMAC authentication signatures and CRC-32 checksums.

Base32, Base58 & Base85 Codecs

Encode text strings into Base32, Bitcoin Base58, or Ascii85 formats.

Classical Substitution Ciphers

Encode or decode strings using ROT13, Caesar, and Vigenere ciphers.

Password Entropy Checker

Calculate password bit-entropy and verify characters strength parameters.

Hash Comparator

Verify if two MD5/SHA256 signature hashes match side-by-side.

CSV Summary Statistics

Upload a CSV file and instantly get count, mean, median, standard deviation, min, and max for every numeric column.

Correlation Matrix Calculator

Compute the Pearson correlation coefficient between every pair of numeric columns in a CSV file.

Histogram Generator

Visualize the distribution of any numeric column from a CSV file as an adjustable-bin histogram.

Box Plot Generator

Generate a box-and-whisker plot showing the five-number summary and outliers for each numeric column in a CSV file.

Scatter Plot Generator

Plot any two numeric columns from a CSV file against each other, with the Pearson correlation coefficient shown alongside.

Programming Language Converter

Convert code between 40+ programming languages — Python, JavaScript, Java, C++, Go, Rust, and more. Private, browser-based.

engineering Utilities

Resistor Color Code Decoder

Decode 4, 5, or 6-band resistor color codes using an interactive visual band-picker, with E12/E24 nearest series value comparison.

Ohm's Law Calculator

Calculate electrical Voltage, Current, Resistance, and Power using any two known variables under Ohm's Law.

Voltage Divider Calculator

Compute output voltage or resistance values for a simple dual-resistor voltage divider network.

LED Resistor Calculator

Determine the required series resistance and minimum power rating for single or multiple series LED indicator circuits.

Series/Parallel Equivalence Calculator

Calculate equivalent values for resistors or capacitors connected in series or parallel networks.

Wheatstone Bridge Calculator

Calculate the bridge output voltage or determine the unknown balancing resistor in a Wheatstone Bridge circuit.

555 Timer Calculator

Design astable or monostable 555 timer circuits, computing frequency, duty cycle, period, and pulse intervals.

Decibel (dB) Converter

Convert linear voltage or power ratios to Decibels (dB) and vice-versa.

RC Filter Cutoff Frequency Calculator

Calculate the cutoff frequency (-3dB) of a resistor-capacitor (RC) low-pass or high-pass passive filter.

LC Resonant Frequency Calculator

Calculate the resonant frequency of an inductor-capacitor (LC) tank circuit.

RF Link Budget Calculator

Calculate Free Space Path Loss (FSPL) and estimate signal power at the receiver for wireless links.

PCB Trace Width Calculator

Calculate PCB trace width for target current limits using the IPC-2221 design standard.

AWG Wire Gauge Calculator

Convert American Wire Gauge (AWG) numbers to diameter, cross-sectional area, copper resistance, and ampacity.

Thermal Resistance Calculator

Calculate semiconductor junction temperature based on power dissipation and thermal resistances.

Capacitor Code Decoder

Decode EIA capacitor three-digit number codes and tolerance factors.

Logic Gate Simulator

Simulate AND, OR, NOT, XOR, NAND, and NOR logic gates dynamically.

Binary Calculator

Perform additions, subtractions, and bitwise logical calculations on binary numbers.

Prime Number Generator

Generate lists of prime numbers or test values for primality.

Matrix Calculator

Perform 2x2 matrix multiplication, determinants, and transposes.

Business Days Calculator

Calculate calendar intervals between two dates excluding weekends.

PerfBoard & Stripboard Simulator

Interactive CAD-like browser-based simulator for designing, wiring, and testing Perfboard and Stripboard prototype layouts offline.

Finite Automata Simulator (NFA/DFA)

Draw, design, and simulate Deterministic and Nondeterministic Finite Automata (DFA/NFA) dynamically in-browser.

NFA to DFA Converter

Convert Nondeterministic Finite Automata (NFA) to Deterministic Finite Automata (DFA) using Subset Construction.

DFA Minimizer

Minimize Deterministic Finite Automata (DFA) using Hopcroft's partition-refinement algorithm.

Regex to NFA Converter

Convert regular expression strings into equivalent Nondeterministic Finite Automata using Thompson's construction.

CPU Scheduling Calculator

Free CPU scheduling calculator for FCFS, SJF, SRTF, Priority and Round Robin: Gantt chart plus completion, turnaround, waiting and response times.

Page Replacement Calculator

Count page faults and hits for FIFO, LRU and Optimal page replacement with a frame-by-frame table, compare all three, and check for Belady's anomaly.

Disk Scheduler

Visualize disk head actuator seek tracks for FCFS, SSTF, SCAN, C-SCAN, and LOOK scheduling.

LL(1) Parser

Compute FIRST and FOLLOW sets, remove left recursion, build the LL(1) parsing table, detect conflicts and trace a parse step by step.

LR(0) & SLR(1) Parser

Build LR(0) item sets and the ACTION/GOTO table for LR(0) or SLR(1), find shift-reduce and reduce-reduce conflicts, and trace a bottom-up parse.

Truth Table Generator

Generate the full truth table for a boolean expression with up to 5 variables.

Karnaugh Map Solver

Click cells on a 2, 3, or 4-variable Karnaugh map to get the minimized sum-of-products expression.

finance Utilities

Systematic Investment Plan (SIP) Calculator

Estimate future returns of your monthly SIP investments with detailed year-by-year projections and charts.

EMI Loan Calculator

Calculate equated monthly installments (EMI), total interest payable, and view your detailed amortization table.

Compound Interest Calculator

Simulate savings growth over time with customizable compound frequencies and monthly contributions.

Live Currency Converter

Convert national currencies instantly using live exchange rates cached for maximum speed and privacy.

GST / VAT Calculator

Add or remove GST/VAT from an amount at any tax rate, with a full breakdown of base, tax, and total.

NPV & IRR Calculator

Calculate Net Present Value and Internal Rate of Return for a series of cash flows.

Break-Even Point Calculator

Calculate the break-even sales volume and revenue from fixed costs, price, and variable cost per unit.

Depreciation Calculator

Generate a depreciation schedule using straight-line or declining balance methods.

image Utilities

Image Format Converter

Convert images between PNG, JPEG, WebP, and GIF formats client-side.

Image Compressor & Resizer

Reduce image file size, adjust dimensions, and scale images client-side.

SVG to Image Converter

Convert SVG code or files into high-resolution PNG or JPEG formats.

Image Base64 Converter

Convert images to base64 data URLs or decode base64 strings back to images.

Color Palette Extractor

Extract dominant color palettes and pick colors from images with a pixel magnifier.

Meme Generator

Create custom memes by adding top and bottom text overlay with customizable fonts.

Rotate & Flip Image

Rotate images by degrees or flip them vertically/horizontally in real-time.

Image Filter & Adjuster

Adjust brightness, contrast, saturation, and blur levels of images dynamically.

Retro Image Pixelator

Transform standard photographs into retro pixel art grids dynamically.

SVG Viewer & Optimizer

Render raw SVG markup, inspect vector code, and strip formatting/comments.

Multi-Size Favicon Generator

Generate multi-size web favicons (16x16, 32x32, 48x48) instantly from any image.

Barcode Generator (Code-128)

Generate standard Code-128 barcode graphics from any text string client-side.

pdf Utilities

PDF Merger

Combine multiple PDF files into a single document client-side.

PDF Splitter

Extract specific pages or page ranges from a PDF document.

PDF Page Rotator & Deletor

Rotate pages clockwise or delete unwanted pages from a PDF document.

Images to PDF Converter

Convert multiple PNG or JPEG images into a formatted PDF document.

PDF Metadata Editor

Edit standard PDF document properties such as Title, Author, and Subject.

robotics Utilities

PID Tuning Helper

Simulate first-order lag and delay control systems, suggest PID gains using Ziegler-Nichols or Cohen-Coon rules, and plot the step response.

Forward Kinematics 2R Arm Simulator

Calculate and visually simulate the end-effector position of a 2-joint planar robotic arm using link lengths and joint angles.

Inverse Kinematics 2R Arm Calculator

Calculate joint angles required to position a 2-joint planar robotic arm at a target X-Y coordinate.

Robotic Arm Joint Torque Calculator

Compute worst-case static holding torques required for joint actuators under gravity loading.

DH Parameters Matrix Calculator

Calculate Denavit-Hartenberg (D-H) homogeneous transformation matrices for robot link frames.

Robot Drive Speed & Torque Calculator

Determine required wheel RPM, motor torque, and power based on robot mass, acceleration, and wheels.

Battery Run Time Calculator

Estimate robot or drone operating duration based on battery capacity and average current draw.

LiPo Battery Charge Rate Calculator

Determine charge rate (C-rate) and estimate charge time for lithium polymer battery packs.

Stepper Motor Speed & Step Calculator

Calculate steps per revolution and motor RPM from step pulse frequencies and microstepping settings.

IMU Orientation Converter

Convert 3D orientation representations between Unit Quaternions and Euler angles.

H-Bridge Power Dissipation Calculator

Calculate motor driver heat dissipation based on current and MOSFET on-resistance.

student Utilities

Percentage Calculator

Calculate percentages, percentage increases, and fractional conversions easily.

Attendance Calculator

Calculate current attendance, and see how many classes you can skip or must attend to hit your target.

CGPA Calculator

Calculate your cumulative grade point average (CGPA) from semester GPAs or individual subject grades.

Exam Countdown

Keep track of upcoming exams with live countdown timers, sorted by date.

Semester Planner

Plan your semester courses and target grades to calculate your expected GPA.

Timetable Generator

Generate, customize, and export a weekly class timetable as a high-quality PNG image.

Assignment Cover Page Maker

Generate standard assignment cover pages matching university formats and download them as clean PDFs.

Citation Generator

Format references and citations in APA, MLA, and Chicago styles for books, websites, and journals.

Study Timer

A Pomodoro study timer with notifications and AudioContext audio alerts for study sessions.

Grade Calculator

Calculate the final exam grade needed to secure your target course percentage.

Scientific Calculator

A standard scientific calculator with trigonometric, log, and constant functions.

Text to Speech

Convert written text to spoken audio using standard speech voices and control pitch/speed.

Speech to Text

Transcribe spoken words into text in real-time with multi-language support and copy utility.

Lab Report Formatter

Format academic lab reports, input experimental observations, and compile them into clean PDFs.

Notes to PDF

Write rich markdown lecture notes, preview the layout, and compile them into styled PDF papers.

Derivative Calculator

Compute the symbolic derivative of a single-variable function and evaluate it at any point.

Definite Integral Calculator

Numerically evaluate a definite integral of a function between two bounds using Simpson's rule.

Linear System Solver

Solve a system of up to 5 linear equations (Ax = b) using Gaussian elimination.

Statistics Calculator

Compute mean, median, mode, variance, standard deviation, and quartiles from a list of numbers.

Probability Distribution Calculator

Compute PDF/PMF and CDF values for the normal, binomial, and Poisson distributions.

Neural Network Parameter & FLOPs Calculator

Estimate total trainable parameters and forward-pass FLOPs for a fully-connected neural network.

Confusion Matrix Calculator

Compute accuracy, precision, recall, specificity, and F1 score from a binary confusion matrix.

Statistical Significance Test Calculator

Run a one-sample t-test, two-sample (Welch's) t-test, or chi-square test and get the test statistic and p-value.

Sample Size Calculator

Calculate the minimum sample size needed to estimate a proportion within a chosen margin of error and confidence level.

text Utilities

TEXT

Word Counter

Count words, characters, sentences, paragraphs, and estimate reading time in real-time.

TEXT

Text Diff & Compare

Compare two blocks of text side-by-side to highlight line additions and deletions.

web Utilities

QR Code Generator

Generate custom QR Codes with custom colors, margins, error levels, and logo overlays.

CIDR / Subnet Calculator

Calculate network address, broadcast address, subnet mask, and host counts from an IPv4 CIDR block.

IP Address Converter

Convert an IPv4 address between dotted-decimal, binary, hexadecimal, octal, and 32-bit integer.

MAC Address Formatter

Normalize a MAC address into colon, hyphen, or Cisco dot notation, and generate random test MACs.

HTTP Status Code Reference

Searchable reference for standard HTTP response status codes and what they mean.

Port Number Lookup

Look up well-known and commonly used TCP/UDP port numbers and the services that use them.