Free Online Tools
for Everyone

Developer utilities, calculators, writing tools and more. No account creation, no downloads, no waiting.

Developer View all →

Format, validate and auto-fix JSON. Repairs trailing commas, bad quotes and unquoted keys. Sort keys, minify, upload files and load from URL.

Test regex with live highlighting. Match, Substitution and List modes. Capture groups, plain-English explainer, cheat sheet and "Why didn't it match?" hints.

Encode and decode Base64. Base64URL, no padding, 76-char MIME chunks, per-line encoding, image to data URI, file upload and auto-strip data URI prefixes.

HEX to RGB Converter

Convert HEX to RGB, RGBA, HSL, HSV, CMYK, OKLCH and CSS instantly. Colour picker, RGB sliders, contrast checker and named colour reference table.

Unix Timestamp Converter

Convert Unix timestamps to dates and back. Batch mode for multiple timestamps. Auto-detects seconds, ms and microseconds. ISO 8601, RFC 2822, week number, code snippets.

Colour Palette Generator

Generate colour palettes from a base colour or extract from any image. 7 harmony types, 8 mood themes, 3–8 colours, lock and regenerate, copy CSS vars, download PNG.

CSS Gradient Generator

Build CSS gradients visually. Linear, radial, conic and repeating types. Per-stop opacity, colour format output, vendor prefixes, CSS selector and 20 categorised presets.

Generate UUID v1, v4, v5, v7 and Nil. GUID braces format, bulk download, and a decoder that reads version and timestamp.

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes. Bcrypt generator and verifier with adjustable cost rounds.

Format and minify SQL with a token-based parser. Handles subqueries, CASE blocks, 10 dialects, comma position and keyword case.

Decode and inspect JWT tokens. View header, payload, expiry and signature details instantly.

CSV to JSON Converter

Convert CSV to JSON with four output formats — array, keyed, JSON Lines and array of arrays. Upload files, auto-detect delimiter, parse types, transpose and download.

URL Encoder / Decoder

URL encode and decode with component or full-URL mode. Space as %20 or +. Encode per line. Built-in URL parser decodes every query parameter.

Text Diff Checker

Compare two texts with line, word or character-level diff. Side-by-side or inline view. Ignore whitespace and case. Similarity percentage shown.

HTML Formatter & Beautifier

Format and beautify messy HTML or minify for production

CSS Formatter & Minifier

Format, sort and minify CSS stylesheets

JavaScript Formatter & Minifier

Beautify or minify JavaScript code

Number Base Converter

Convert between binary, octal, decimal and hex

Cron Job Generator & Explainer

Build cron expressions with visual builder and explanations

Schema Markup Generator

Generate JSON-LD structured data for 15 schema types

SERP Snippet Preview

Preview how your page appears in Google search results

Box Shadow Generator

Generate CSS box-shadow and text-shadow with live preview

Markdown Editor

Write Markdown with real-time HTML preview

Robots.txt Generator

Build a robots.txt file with bot rules and sitemap

LLM Token Counter

Count tokens and estimate API costs for 10 LLM models

Mock JSON Data Generator

Generate realistic mock JSON test data from a custom schema

Colour Contrast Checker

Check WCAG AA and AAA colour contrast compliance

Open Graph Tag Generator

Generate Open Graph and Twitter Card meta tags

Calculator View all →

Percentage Calculator

Six percentage calculators: X% of Y, find the whole, percentage change, add/subtract percentage, and marks-to-percentage with automatic WAEC grade.

Calculate exact age in years, months, days, hours and minutes. Zodiac sign, leap years count, next birthday countdown and reverse age-to-birth-year calculator.

Date Difference Calculator

Calculate days between two dates with weekdays, weekends and business days. Skip Nigerian public holidays. Add or subtract days to find a future or past date.

JAMB Aggregate Calculator

Calculate JAMB aggregate for UNILAG, UI, OAU, UNN, ABU and UNIBEN. Post-UTME included. Compare with cutoff marks and see admission likelihood.

WAEC Grade Calculator

Calculate WAEC aggregate, credits and GPA from your scores or grades. Course eligibility checker for 18 courses. NECO and GCE supported. WES GPA conversion table.

Random Number Generator

Generate random integers, decimals, lists or dice rolls

Roman Numeral Converter

Convert numbers to Roman numerals and back

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin and more

Discount Calculator

Calculate sale prices, savings and discount percentages

Fraction Calculator

Add, subtract, multiply and divide fractions with steps

Quadratic Equation Solver

Solve ax²+bx+c=0 with discriminant and step-by-step working

Trigonometry Calculator

Calculate sin, cos, tan and all trig functions

Scientific Notation Converter

Convert numbers to and from scientific notation

LCM & HCF Calculator

Find lowest common multiple and highest common factor

Weight Converter

Convert between kg, lbs, stone, ounces and more

Length & Distance Converter

Convert between metres, miles, feet, inches and more

Data Storage Converter

Convert bytes, KB, MB, GB, TB in SI and IEC standards

Work Hours Calculator

Calculate hours worked from start and end times

Sleep Cycle Calculator

Find the best sleep and wake times based on sleep cycles

Running Pace Calculator

Calculate running pace, finish time or distance

Calories Burned Calculator

Calculate calories burned during 30+ exercise activities

Finance View all →

PAYE Tax Calculator

PAYE tax calculator updated for Nigeria Tax Act 2025 (2026). Compare old vs new law. Pension, NHF, NHIS and rent relief included. Monthly or annual input.

Salary Calculator Nigeria

Calculate take-home pay using 2026 NTA rates. Gross-to-net and net-to-gross. Full payslip breakdown with employer cost including NSITF and ITF.

Naira Inflation Calculator

Calculate how Nigerian inflation eroded your naira's value. Historical NBS/CBN rates 2000–2025. Future value and purchasing power modes with year-by-year table.

Loan Calculator

Calculate loan repayments and total interest with full amortization schedule. Monthly, quarterly or annual frequency. Affordability check and max loan from budget.

Interest Calculator

Calculate simple and compound interest on savings

Profit Margin Calculator

Calculate gross margin, net margin and markup

Calculate tips and split bills between people

VAT Calculator (Nigeria 7.5%)

Add or remove 7.5% Nigeria VAT from any price

Writing View all →

Count words, characters and pages. Reading and speaking time with speed selector. Flesch readability score, keyword density and platform character limit indicators.

Convert text to 14 cases: UPPERCASE, lowercase, Title Case, camelCase, PascalCase, snake_case, kebab-case, dot.case, path/case and more. Click to copy.

Lorem Ipsum Generator

Generate placeholder text in 5 types: Classic Lorem Ipsum, Cicero, Pangrams, Corporate and Hipster. By paragraphs, sentences, words or characters. HTML output with headings.

Fancy Text Generator

Generate text in 15 Unicode font styles for social media

Hashtag Generator

Generate relevant hashtags for Instagram, TikTok and X

Duplicate Line Remover

Remove duplicates and sort any list instantly

Morse Code Encoder / Decoder

Convert text to Morse code and back with audio playback

Utility View all →

Password Generator

Generate random passwords, memorable passphrases or PINs. Shows entropy bits and crack time estimate. Uses crypto.getRandomValues — passwords never leave your browser.

QR Code Generator

Generate QR codes for URLs, vCard contacts, WiFi, WhatsApp, Email, SMS, phone calls and Nigerian bank transfers. Custom colours, error correction, PNG & SVG download.

Countdown Timer

Countdown timer with alarm sound, stopwatch with lap variance tracking, and Pomodoro timer with automatic work/break cycles. Three tools in one. No install.

IP Address Lookup

Look up any IP address for location, ISP, ASN, timezone and connection type. Country flag, OpenStreetMap preview, IPv6 detection and VPN/proxy/datacenter badge.

Reference View all →

Data Plan Comparator

Compare 60+ data plans from MTN, Airtel, Glo and 9mobile — 2026 prices after NCC tariff hike. Filter by network, duration and budget. Sort by best ₦/GB value.

Bank USSD Codes

50+ Nigerian bank USSD codes — commercial banks, fintechs, digital banks and Islamic banks. Transfer, balance, airtime codes. Click to copy. Updated 2026.

Public Holiday Calendar

Official Nigerian public holidays 2025–2027. Confirmed 2026 dates for Eid el-Fitr, Eid el-Kabir, Eid el-Maulud, Easter, Christmas and Democracy Day (June 12). Days countdown.