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UtilityToolsLabFree Friendly Online Utilities for Everyday Tasks

UtilityToolsLab is a free, friendly collection of online utility tools for everyday tasks. No ads, no sign-up, no nonsense. Just tools that work.

Text & Content

Case converters, counters, formatters and word tools

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Word Counter

Count words, characters, sentences, paragraphs, lines, and reading time in real time with keyword analysis.

Case Converter

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

Paragraph Formatter

Clean and reformat text by removing extra spaces, collapsing blank lines, trimming each line, or joining into a single line.

Keyword Density

Analyze keyword frequency and density in any text. Visualizes the top 20 most-used words with percentage bars.

Text Reverser

Reverse text by characters, words, lines, or word-order within each line. Instant real-time output.

Lorem Ipsum

Generate customizable Lorem Ipsum placeholder text by paragraphs, sentences, words, or bullet lists for mockups.

Text ↔ Binary

Convert plain text to 8-bit binary representation and decode binary back to readable text instantly.

Text ↔ Hex

Convert text to hexadecimal encoding and decode hex back to text. Supports multiple separator formats.

Text ↔ Base64

Encode plain text to Base64 and decode Base64 strings back to human-readable text. Supports Unicode.

Morse Code

Translate text to Morse code and decode Morse back to text. Includes audio playback and a full Morse reference chart.

Whitespace Remover

Strip, collapse, or convert whitespace from text. Remove all spaces, collapse extras, convert tabs, or clear blank lines.

Line Counter

Count total, empty, non-empty, unique, and duplicate lines in any text. Extract and copy unique lines instantly.

Text Diff

Compare two blocks of text side-by-side. Highlights added, removed, and unchanged lines with a visual diff view.

Find & Replace

Find strings inside any text and replace them dynamically. Supports regex, case-sensitive, and replace-all modes.

Slug Converter

Convert any text into a clean, SEO-friendly URL slug with hyphen, underscore, or dot separators. Handles accented characters.

Text Cleaner

Strip HTML tags, remove special characters, emoji, URLs, emails, punctuation, and extra whitespace from any text.

Text Sorter

Sort lines A-Z, Z-A, by length, reverse, shuffle, or extract unique lines. Options to trim and ignore empty lines.

URL Encode

Encode and decode URLs using encodeURI, encodeURIComponent, or raw percent-encoding. Includes common character reference table.

Number to Words

Convert any number to English words, ordinal form, or currency text. Supports integers, decimals, negatives up to 999 Trillion.

Roman Numerals

Convert integers (1–3999) to Roman numerals and decode Roman numerals back to Arabic numbers. Full reference table included.

Duplicate Remover

Remove duplicate lines from any text. Choose to keep first, keep last, or remove all occurrences. Supports case-insensitive matching, sorting, and line trimming.

Palindrome

Check if any word, phrase, or sentence is a palindrome. Ignore spaces, punctuation, and case. Shows character mirror diff and longest palindromic substring.

NATO Alphabet

Convert any text to NATO phonetic alphabet (Alpha, Bravo, Charlie…) and decode NATO words back to text. Full clickable reference chart included.

Text Cipher

Encrypt and decrypt text using Caesar cipher, ROT13, Atbash, and Vigenère cipher. Includes adjustable shift, custom keyword, and instant swap.

Reading Level

Analyze the reading difficulty of any text. Calculates Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, Coleman-Liau, and SMOG scores instantly.

Image & Design

Compressors, color tools, CSS generators and more

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Image Compressor

Compress JPEG, PNG, and WebP images in your browser. Control quality and max dimensions — no server upload required.

HEX ↔ RGB

Convert color codes between HEX, RGB, RGBA, and HSL formats instantly. Includes a visual color preview.

QR Code

Generate downloadable QR codes from any URL, text, email, or phone number instantly in your browser.

Color Palette

Generate harmonious color palettes from any base color. Supports complementary, triadic, analogous, and monochromatic schemes.

Gradient Generator

Generate linear, radial, and conic CSS gradients visually. Add unlimited color stops, adjust angles, use presets, copy ready CSS.

Contrast Checker

Check WCAG 2.1 contrast ratios between foreground and background. Shows AA/AAA pass/fail for normal and large text sizes.

Code & Dev

JSON, Base64, UUID, JWT, timestamps and encoders

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JSON Formatter

Paste raw JSON to instantly format, beautify, validate, and minify it.

Base64

Encode plain text to Base64 and decode Base64 strings back to human-readable text.

UUID Generator

Generate RFC 4122 compliant UUID v4 strings. Batch-generate up to 100 UUIDs at once.

JWT Decoder

Decode and inspect JSON Web Tokens. View header, payload, and signature. Detects expiry and maps all registered JWT claims.

Timestamp

Convert Unix timestamps to human-readable dates and convert dates back to Unix time. Live clock with ISO 8601, UTC, and local formats.

Math & Calc

Percentage, BMI, tip, temperature and unit converters

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% Calculator

Calculate percentages, percentage change, and what percent one number is of another.

BMI Calculator

Calculate your Body Mass Index (BMI) using metric or imperial units with health category feedback.

Tip Calculator

Calculate tip amounts and split bills between any number of people. Quick tip buttons, custom percentage, and per-person breakdown.

Temperature

Convert temperatures between Celsius, Fahrenheit, Kelvin, Rankine, and Delisle instantly. Common reference points included.

Age Calculator

Calculate your exact age in years, months, days, hours, and minutes from your date of birth. Shows total counts and next birthday countdown.

Security

Password generators, hash tools and crypto utilities

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Password Generator

Generate cryptographically strong passwords with custom length, symbols, numbers, and uppercase options.

Competitive Programming

Algorithms, Big-O analysis, I/O generators and code formatters for coders

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Code Formatter

Format and beautify C++, Java, and Python code with consistent indentation. 100% client-side — no code leaves your browser.

Matrix Generator

Generate grid/matrix inputs for competitive programming. Random, zeros, identity, or sequential fill. Outputs in multiple formats.

Complexity Calc

Estimate Big-O operations and runtime for any N. Interactive reference table for all complexity classes from O(1) to O(N!).

Bit Visualizer

Toggle 32/64-bit grids. Click bits to flip them live and see decimal recalculate. Shows popcountll, clzll, ctzll, and MSB instantly.

Bitmask Planner

Input set size N (≤12). Visualize all 2^N bitmasks, submask iterations, and generate ready-to-paste C++ DP skeleton.

Prime Factors

Input N to instantly view prime factorization, total divisors, Euler totient, and full sorted divisors list with prime highlighting.

MEX Calc

Input a comma-separated array and see the MEX (Minimum Excluded) computed step-by-step with frequency table and visual walkthrough.

Interval Merger

Input pairs of ranges like [1,4],[3,7]. Visualizes overlaps on a timeline and collapses them into merged segments instantly.

Matrix Rotation

Input a 2D matrix, choose 90°/180°/270° CW or CCW rotation. See the visual index shift and get the C++ implementation.

PBDS Generator

Generate ready-to-paste C++ Order Statistics Tree code. Configure key type, comparator, and duplicate support. One-click copy.

Segment Tree

Input an array, choose sum/min/max/gcd. See the segment tree visualization and get a complete C++ class template to copy.

Graph Visualizer

Paste CP-style edge lists and watch a force-directed graph build itself. Drag nodes, toggle directed/undirected, 0/1-indexed. Outputs adjacency list with one-click copy.

Stress Tester

Paste your brute force, optimal solution, and test generator. Instantly get a downloadable Python or Bash stress test script that finds counter-examples automatically.

Modulo Calc

Compute modular inverse, fast power modulo, and nCr mod p using BigInt precision. One-click C++ snippet output for each operation.

Binary Visualizer

Interactive 32-bit grid — click any bit to flip it live. Shows decimal, hex, binary, popcount, clz, ctz, MSB, and common bitwise operations instantly.

Convex Hull

Click the canvas to place coordinate points. Renders the enclosing convex hull polygon live using Andrew's monotone chain. Outputs C++ points vector.

Path Finder

Paint walls on an N×M grid, set start and end cells, then run BFS to visualize the shortest path. Copy the grid as a C++ 2D vector instantly.

PDF Utilities

100% client-side PDF tools — no uploads, no servers, full privacy

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PDF Metadata

Instantly view PDF page count, version, author, title, and more. Parsed 100% in your browser — no upload required.

Images → PDF

Convert multiple JPG/PNG images into a single PDF. Reorder pages, then print-to-PDF using your browser. 100% client-side.

PDF → Text

Extract raw text from text-based PDFs directly in your browser. Copy the full text content without any server uploads.