SlimUtils Free Online Tools for Everyday Tasks

Tip Calculator

Calculate tip and split bills between any number of people.

Loan Calculator

Calculate monthly payments, total interest, and amortization schedule.

VAT Calculator

Add or remove VAT for 26 countries. Supports EU, UK, Australia, Canada, and more.

FIRE Calculator

Calculate your Financial Independence number and years to retire early using the 4% rule.

Percentage Calculator

Calculate percentages three ways: find X% of Y, find what percent one number is of another, or calculate percentage change. All instant and local.

Currency Converter

Convert currencies with live European Central Bank rates. 30+ currencies, 7-day trend chart, no API key needed.

Password Generator

Generate strong, random passwords using cryptographic randomness.

Word Counter

Count words, characters, sentences, paragraphs, and reading time.

Case Converter

Convert text to UPPERCASE, camelCase, snake_case, kebab-case, and more.

Lorem Ipsum Generator

Generate placeholder text instantly. Choose words, sentences, or paragraphs. Start with classic Lorem Ipsum or use random English words. Copy to clipboard. All local.

Due Date Calculator

Calculate pregnancy due date, current week, trimester, and milestones.

Business Days Calculator

Count business days between dates or add/subtract working days.

Date Duration Calculator

Calculate exact duration between two dates or add/subtract time.

Time Until

Live countdown to any future event — or time since any past date.

QR Code Generator

Create QR codes for URLs, WiFi passwords, vCards, and more.

Meeting Cost Calculator

Calculate the real cost of meetings based on attendee salaries. Live timer shows money spent per second.

BPM Tapper

Tap a beat or press space to measure tempo in BPM instantly. Great for musicians, DJs, and practice sessions. All local.

Timezone Overlap Calculator

Find overlapping working hours across multiple cities and remote teams. Great for scheduling meetings across time zones.

Pomodoro Timer

Stay focused with a customizable Pomodoro timer. 25-min focus sessions, short breaks, and long breaks with progress ring.

Baby Name Meanings

Look up meanings and origins of 5,000+ baby names.

Sibling Name Matcher

Find sibling names that match in style, origin, and sound.

Fake Data Generator

Generate realistic fake names, emails, addresses, and UUIDs for testing.

CSS Gradient Generator

Build linear, radial, and conic CSS gradients visually.

Cron Expression Generator

Build and explain cron expressions with plain-English descriptions and next run times.

JSON Formatter

Format, minify, and validate JSON instantly. Paste messy JSON and get clean, indented output with stats.

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 to text instantly. Supports full Unicode. All processing is local and private.

URL Encoder/Decoder

Encode text for safe URL use or decode percent-encoded URLs. Handles full Unicode. All processing is local.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly. View output in hex or Base64. All processing is local and private.

JWT Decoder

Decode and inspect JSON Web Tokens. View header, payload, and signature. Verify HS256 signatures with a secret. Check expiry status. All local.

Color Converter

Convert colors between HEX, RGB, and HSL formats instantly. Visual color preview, WCAG contrast checker, and palette generator. All local.

UUID Generator

Generate UUID v4 (random) and UUID v1 (timestamp) instantly. Choose uppercase/lowercase, with or without hyphens. Copy individually or in bulk. All local.

HTML Encoder/Decoder

Encode text to HTML entities or decode HTML entities back to text. Supports all standard HTML5 entities. All processing is local and private.

SQL Formatter

Format, indent, and pretty-print SQL queries instantly. Choose uppercase or lowercase keywords, adjust indent size, or compress to one line. All local.

JavaScript Minifier/Formatter

Minify JavaScript to reduce file size for production, or format messy code for readability. Shows size reduction percentage. All local.

CSV to Markdown Table

Convert CSV or TSV data into a clean Markdown table instantly. Paste, format, and copy. All processing stays in your browser.

Color Accessibility Checker

Check color contrast ratios against light and dark backgrounds. See WCAG pass/fail results instantly. All local.

SVG Data URI Encoder

Encode raw SVG into a ready-to-use Data URI for CSS or HTML. Includes live preview and copy buttons. All local.

Aspect Ratio Calculator

Calculate proportional dimensions for images, videos, and layouts. Supports common ratios like 16:9, 4:3, and 1:1.

Unix Timestamp Converter

Convert between Unix epoch timestamps and human-readable dates. Live current timestamp with copy functionality.

Keycode Info

Press any key to see its JavaScript keycode, key name, code, and location. Essential for keyboard event handling.

Chmod Calculator

Calculate Linux file permissions in octal and symbolic notation. Toggle read/write/execute for user, group, and other.

Meta Tag Builder

Generate complete HTML meta tags, Open Graph, and Twitter Card tags for SEO and social sharing. Copy ready-to-paste output.

Midjourney Prompt Builder

Build optimized AI art prompts with style, lighting, and parameters.

AI Prompt Library

Browse and copy curated ChatGPT prompts for writing, coding, marketing, and more.

Image to Video Maker

Turn images into a short video with captions, transitions, and optional background music. All runs locally in your browser.

Scrabble Word Finder

Find valid Scrabble words from your rack letters. Supports TWL, SOWPODS, and WWF dictionaries.

Box Shadow Generator

Design CSS box-shadow visually with live preview. Adjust X/Y offset, blur, spread, and color. Copy ready-to-use CSS.

Glassmorphism Generator

Generate CSS glassmorphism effects with blur and transparency controls. Live preview and ready-to-copy CSS output.

Golden Ratio Calculator

Calculate harmonious dimensions using the golden ratio (1.618). Perfect for layouts, typography, and design scaling.

CSS Triangle Generator

Create pure CSS triangles visually. Choose direction, size, and color. Uses the border hack technique.

UTM Builder

Build UTM-tagged URLs for campaign tracking. Add source, medium, campaign, term, and content parameters to any URL.