Idiot Tools — Free Online Tools That Just Work

01 Text Tools

Count, convert, clean up and compare text in seconds.

#01 📝

Word & Character Counter

Live word, character, sentence and reading-time count.

#02 Aa

Case Converter

UPPER, lower, Title Case, Sentence case, and more.

#03 🔀

Text Compare / Diff

Spot the differences between two blocks of text instantly.

#04 📄

Lorem Ipsum Generator

Placeholder text by word, sentence, or paragraph count.

#05 🧹

Remove Duplicate Lines

Clean up a list by removing repeated lines instantly.

#06 ␣

Remove Extra Spaces

Collapse messy whitespace and blank lines into clean text.

#07 ↵

Remove Line Breaks

Turn multi-line text into one line with a custom separator.

#08 🔁

Text Reverser

Reverse text by character, word order, or line order.

#09 🔗

URL Slug Generator

Turn any title into a clean, SEO-friendly URL slug.

#10 𝗕

Bold & Fancy Text Generator

Bold and italic Unicode text for social bios and posts.

#11 ↕️

List Sorter

Sort A–Z, numerically, or shuffle any list instantly.

#12 ✍️

Writing Style Checker

Spot passive voice and long sentences in your writing.

02 Text Analysis Tools

Readability, summaries, and similarity — understand text at a glance.

📖

Readability Checker

Flesch reading ease score and grade level, live.

📝

Text Summarizer

Extract the most important sentences automatically.

🔍

Text Similarity Checker

Compare two texts for word-overlap similarity.

02 Dev & Data Tools

Format, validate, and convert everyday developer data.

#05 { }

JSON Formatter

Beautify, minify, and validate JSON on the spot.

#06 64

Base64 Encode / Decode

Convert text and data to and from Base64.

#07 🔒

Password Generator

Strong, random passwords with custom length and rules.

#08 ▦

QR Code Generator

Turn any link or text into a downloadable QR code.

#09 %20

URL Encoder / Decoder

Percent-encode or decode text for safe use in a URL.

#10 #

Hash Generator

SHA-1, SHA-256 and SHA-512 hashes, computed locally.

#11 🪪

JWT Decoder

Decode a JWT's header and payload instantly.

#12 .*

Regex Tester

Test patterns against text with live match highlighting.

#13 M↓

Markdown to HTML

Convert Markdown to HTML with a live preview.

#14 ‹/›

Code Minifier

Minify HTML, CSS or JavaScript instantly.

#15 📊

CSV to JSON

Convert CSV data to structured JSON instantly.

#16 ID

UUID Generator

Generate random UUID v4 identifiers, one or many.

#17 🛡️

Password Strength Checker

Check password strength with instant, private feedback.

#18 ✓

Checksum Generator

CRC32 checksum for verifying text integrity.

03 SEO Tools

Meta tags, structured data, and link tools for better search visibility.

🏷️

Meta Tag Generator

Title, description and viewport tags, ready to paste.

🖼️

Open Graph Generator

Rich link previews for Facebook, LinkedIn and more.

{ }

Schema Markup Generator

Article and FAQ JSON-LD structured data.

🔗

UTM Link Builder

Build tagged campaign URLs for analytics tracking.

🔍

Keyword Density Checker

See which words and phrases appear most often.

04 Color Tools

Convert, check, and generate colors and palettes.

🎨

Color Converter

HEX, RGB and HSL, synced live with a color picker.

◐

Contrast Checker

WCAG AA/AAA contrast ratio for text and background.

🌈

Color Palette Generator

Random or harmony-based 5-color palettes.

05 Image Tools

Compress, resize, and convert images — entirely in your browser.

🗜️

Image Compressor

Shrink JPG/PNG file size with an adjustable quality slider.

📐

Image Resizer

Resize to exact pixel dimensions, with aspect-ratio lock.

64

Image to Base64

Convert any image to a Base64 data URI.

🌐

Favicon Generator

Generate 16–180px favicon sizes from one image.

✂️

Image Cropper

Drag to select and crop any area of an image.

🔄

Image Format Converter

Convert between PNG, JPG and WebP instantly.

💧

Image Watermark Tool

Add a text watermark with adjustable opacity.

08 CSS & Design Tools

Build gradients, shadows, and shapes visually, then copy the code.

🌅

CSS Gradient Generator

Design linear or radial gradients visually.

🔲

CSS Box Shadow Generator

Drag sliders to build the perfect drop shadow.

◻️

CSS Border Radius Generator

Shape each corner independently with live preview.

📺

Aspect Ratio Calculator

Calculate proportional dimensions for any ratio.

09 Date & Time Tools

Calculate, count down, and track time instantly.

📅

Date Difference Calculator

Days, weeks, months and years between two dates.

⏳

Countdown Timer

Live countdown to any future date and time.

⏱️

Online Stopwatch

Accurate stopwatch with lap timing.

📆

Day of the Week Finder

Find what day any date falls on.

10 Math Tools

Calculate, check, and convert numbers beyond basic arithmetic.

🧮

Scientific Calculator

Trig, log, roots and powers, right in your browser.

🔢

Prime Number Checker

Check primality or list primes up to a limit.

½

Percentage / Fraction / Decimal

Convert freely between all three number formats.

Ⅻ

Roman Numeral Converter

Convert between Roman numerals and numbers.

11 Generators

Random names, numbers, IDs, and test data on demand.

🧑

Random Name Generator

Generate realistic random full names instantly.

🎲

Random Number Generator

Random numbers in any range, with no duplicates.

🔢

Random PIN Generator

Secure numeric PIN codes of any length.

🗂️

Fake Data Generator

Test names, emails and phone numbers as CSV.

12 More Text & Fun Tools

Translators, converters and utilities that don't fit anywhere else.

•−

Morse Code Translator

Translate text to and from Morse code instantly.

01

Binary / Text Converter

Convert plain text to binary and back.

📊

Word Frequency Counter

See which words appear most often in your text.

🔊

Text to Speech

Have any text read aloud using your browser's voice.

13 Cipher Tools

Classic ciphers and phonetic spelling, for puzzles and learning.

🏛️

Caesar Cipher Tool

Shift letters by any amount to encode or decode text.

13

ROT13 Encoder / Decoder

The same operation both ways — apply twice to reverse.

📻

NATO Phonetic Alphabet

Spell out any text as Alpha, Bravo, Charlie…

14 Health Calculators

BMR, calories, water intake and more — general estimates, not medical advice.

🔥

BMR Calculator

Basal metabolic rate and daily calorie needs.

🍽️

Calorie Calculator

Daily calorie targets for loss, maintenance, or gain.

💧

Water Intake Calculator

Recommended daily water intake from weight and activity.

⚖️

Ideal Body Weight Calculator

Reference weight range based on height and frame.

14 Health Calculators

Estimate calories, hydration, and ideal weight range.

💧

Water Intake Calculator

Daily hydration target based on weight and activity.

⚖️

Ideal Body Weight Calculator

Three standard formulas, compared side by side.

19 Business & Design Tools

Invoices, type scales, placeholders, and barcodes.

🧾

Invoice Generator

Build and print a simple professional invoice.

Aa

Typography Scale Generator

Generate a harmonious font size scale.

🖼️

Placeholder Image Generator

Custom-size, custom-color placeholder images.

▮▯▮

Barcode Generator

Scannable CODE128 barcodes, downloadable as PNG.

15 PDF Tools

Merge, split, and convert PDFs — processed entirely in your browser.

📎

Merge PDF Files

Combine multiple PDFs into one document.

✂️

Split PDF Pages

Extract a page range into a new PDF.

🖼️

PDF to Image Converter

Render every page as a downloadable PNG.

16 Security & Network Tools

Encode, encrypt, and look up network details, all client-side.

32

Base32 Encoder / Decoder

Encode or decode Base32 text instantly.

🌐

My IP Address

See your current public IP address.

🔐

Text Encryption Tool

AES-encrypt text with a password, locally.

17 Converters

One flexible tool per category — pick any two units, no hunting through separate pages.

18 Calculators

Quick calculators for the things you look up over and over.

#09 📏

Unit Converter

Length, weight, temperature and more, converted instantly.

#10 %

Percentage Calculator

Discounts, tips, increases and percentage change.

#11 🎂

Age Calculator

Exact age in years, months, and days from a birthdate.

#12 ⚖️

BMI Calculator

Body mass index from height and weight, metric or imperial.

#13 🏦

Loan / EMI Calculator

Monthly payment, total interest, and total repayment.

#14 📈

Compound Interest Calculator

See how savings or investments grow over time.

#15 🧾

Tip Calculator

Calculate tip and split the bill between any group size.

#16 🎓

GPA Calculator

Weighted GPA from grades and credit hours.

Frequently asked

Are these tools really free?

Yes. Every tool on Idiot Tools runs in your browser and is free to use, with no account or download required.

Do you store what I type into a tool?

No. Text and file tools process everything locally in your browser tab — nothing is uploaded to a server. See our privacy policy for details.

Can I use these tools on mobile?

Yes, the whole site is built to work on phones, tablets, and desktops alike.

Tools simple enough foranyone. Fast enough for everyone.