DIRECTORY

All Online Tools

Every free tool on TheAllTools in one place — search by name or keyword, or browse by category.

This page lists every tool on the site across all seven categories — text, developer, generators, color, image, converters, and horoscope. If you already know roughly what you need, the search box below filters by tool name, short description, and common keywords (try "hex", "convert", "compress", or "zodiac"), so you don't have to remember which category a tool lives under. If you'd rather browse, each section heading links through to that category's own page, which includes a longer explanation of what the category covers and when to reach for one tool over another.

Every tool here follows the same rule: it runs entirely in your browser, with no account, no upload limit tied to a paywall, and no data sent to a server for processing. New tools get added to this directory as soon as they go live, so this page is the fastest way to see what's new without checking each category individually.

Not sure where to start? Text and developer tools tend to get the most daily use — word counting, JSON formatting, and case conversion are the kind of small tasks that come up constantly. Image and color tools are more design/front-end focused, converters solve everyday measurement and currency questions, generators create passwords, QR codes, and random numbers, and horoscope tools are a lighter, just-for-fun category. If a category page doesn't fully answer your question, most individual tool pages below also include a short FAQ and worked example specific to that tool.

Developer Tools

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JSON Formatter

Validate and pretty-print JSON.

Base64 Encode / Decode

Convert text to and from Base64.

Hash Generator

Generate SHA-1, SHA-256, SHA-512 hashes.

UUID Generator

Generate RFC-4122 v4 UUIDs.

URL Encode / Decode

Percent-encode strings and URLs.

Regex Tester

Test regex patterns with live highlighting.

Markdown Previewer

Live-render Markdown as you type.

CSS Minifier

Strip whitespace and comments from CSS.

JS Minifier

Light cleanup for smaller JS files.

Unix Timestamp Converter

Convert Unix epoch time to a date, and back.

JWT Decoder

Decode a JSON Web Token's claims.

Cron Expression Generator

Build a cron schedule visually.

Binary Translator

Translate text to binary and hex, and back.

CSV to JSON

Convert CSV or spreadsheet rows into JSON.

JSON Diff

Compare two JSON documents by path.

JSON to CSV

Convert JSON to CSV and flatten nested objects.

YAML to JSON

Convert YAML to JSON and JSON to YAML.

PX to REM Converter

Convert px to rem and back, with a 16px chart.

Subnet Calculator

IPv4 CIDR, subnet mask, hosts and ranges.

XML Formatter

Pretty print, minify and check XML.

HTML Formatter

Beautify or minify HTML code.

SQL Formatter

Format SQL queries for 14 dialects.

Screen Resolution Checker

See your screen, viewport and pixel ratio.

Keyboard Tester

Test every key and key rollover online.

Mic Test

Check your microphone with a live meter.

UTM Builder

Tag campaign links for Google Analytics 4.

Chmod Calculator

Octal, symbolic and umask permissions.

User Agent Parser

See the browser, OS and device behind a user agent.

URL Parser

Split a URL into parts and edit its query.

TOTP Generator

Get 2FA codes from a secret and verify codes.

ULID Generator

Sortable unique IDs, batch generate and decode.

RSA Key Generator

Generate an RSA key pair in PEM format.

Docker Run to Compose

Convert a docker run command to docker-compose.yml.

AES Encryption

Encrypt and decrypt text with AES using a passphrase.

JSON to XML Converter

Convert JSON to XML and XML to JSON.

CSS Grid Generator

Build grid layouts with CSS and Tailwind output.

Markdown Table Generator

Turn CSV or spreadsheet cells into a Markdown table.

Unit Converter

Convert length, weight, temp, volume.

Currency Converter

Convert currencies with live rates.

Age Calculator

Find exact age in years, months, and days.

Percentage Calculator

Find a percentage, increase/decrease, or add/subtract %.

Grade Calculator

Final grade needed and weighted average grade.

Hours Calculator

Hours between two times, with decimal hours.

Timer & Stopwatch

Countdown timer with presets, plus a lap stopwatch.

Countdown to a Date

Count down to any future date and time.

Date Calculator

Count days between dates, or add and subtract days.

CM to Inches

Convert centimeters to inches.

KG to LBS

Convert kilograms to pounds.

MM to Inches

Convert millimeters to inches.

Celsius to Fahrenheit

Convert temperatures instantly.

Fraction to Decimal Chart

Printable 1/64 chart and fraction converter.

Time Zone Converter

Convert times across zones and plan meetings.

PST to EST

Pacific to Eastern time, with an hourly chart.

CST to EST

Central to Eastern time, with an hourly chart.

UTC to EST

UTC to Eastern time, summer and winter.

GMT to EST

London or GMT to Eastern time, with BST.

UTC to PST

UTC to Pacific time, summer and winter.

EST to IST

US Eastern to India time, and back.

Binary to Decimal

Convert binary and decimal, with steps.

Hex to Decimal

Convert hex and decimal, with a 00-FF chart.

PST to CST

Pacific to Central time, with an hourly chart.

MST to EST

Mountain or Arizona to Eastern time.

CET to EST

Central European to Eastern time.

Voltage Drop Calculator

Voltage drop and wire size for copper or aluminum.

Ohm's Law Calculator

Solve volts, amps, ohms and watts.

Resistor Color Code

Decode 4, 5 and 6 band resistors.

LED Resistor Calculator

Find the right resistor for an LED.

Electricity Cost Calculator

kWh and cost per day, month and year.

Business Days Calculator

Working days with US, CA, UK, AU holidays.

Sig Fig Calculator

Count and round significant figures.

Confidence Interval Calculator

Confidence interval for a mean or a proportion.

Z-Score Calculator

Z-score, percentile and probability from a value or z.

P-Value Calculator

P-value from z, t, chi-square or F with critical values.

Linear Regression Calculator

Line of best fit, r, R-squared and a scatter plot.

Probability Calculator

Two-event and binomial probability with steps.

Standard Deviation Calculator

Sample and population standard deviation, variance and steps.

One Rep Max Calculator

Estimate your 1RM from any set, with a percentage chart.

Scientific Notation Calculator

Convert numbers and calculate in scientific notation.

GCF & LCM Calculator

Find the GCF (GCD, HCF) and LCM of 2 to 10 numbers with steps.

Roman Numeral Converter

Convert numbers and dates to Roman numerals.

Calorie Calculator

Daily calories to lose or maintain.

Calorie Deficit Calculator

Daily target and weeks to goal.

CM to Feet and Inches

Convert centimeters to feet and inches.

Compound Interest Calculator

See how savings grow over time.

Phone Number Parser

Validate and format phone numbers for any country.

IBAN Validator

Check an IBAN with the mod-97 test.

Duration Calculator

Add or subtract two time durations.

Feet to CM

Convert feet and inches to cm.

Fraction Calculator

Add, subtract, multiply, or divide fractions.

Gallons to Liters

Convert gallons, quarts, cups, liters.

Grams to Ounces

Convert grams to ounces.

Inches to MM

Convert inches to mm and cm.

KM to Miles

Convert kilometers to miles.

LBS to KG

Convert pounds to kilograms.

Macro Calculator

Daily protein, carbs and fat.

Oz to ML

Convert fluid ounces to milliliters.

Percent Change

Percent increase and decrease.

Hours Calculator

Hours worked and weekly timesheet.

Square Footage Calculator

Area in sq ft, sq m and acres.

MPH to KMH

Convert mph, km/h, knots and m/s.

Average Calculator

Mean, median, mode and range.

Quadratic Formula Calculator

Roots, discriminant and vertex.

Fahrenheit to Celsius

Convert F to C with a chart.

GPA Calculator

Semester and cumulative GPA.

Reseller Fee Calculators

Whatnot, Depop, Mercari and more.

Whatnot Fee Calculator

Tiered commission, payout and profit.

Depop Fee Calculator

US fees, boost and payout.

Grailed Fee Calculator

Commission tiers and processing.

Mercari Fee Calculator

10% fee, payout and profit.

Poshmark Fee Calculator

Flat fee and 20% commission.

TCGplayer Fee Calculator

Commission, cap and transaction fee.

KDP Royalty Calculator

Kindle and paperback royalties.

3D Print Cost Calculator

Cost per part and selling price.

Robux Tax Calculator

Roblox fee and price to list.

BAC Calculator

Estimate blood alcohol content.

Tablespoons to Cups

Convert tablespoons to cups.

TDEE Calculator

Total daily energy expenditure.

Tsp to Tbsp

Convert teaspoons to tablespoons.

Weeks in a Year

How many weeks in a year, and weeks left.

Horoscope Tools

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Find a tool by task

If you know what you're trying to do but not what the tool is called, start here:

What to expect from every tool

Most tool pages follow the same pattern: the tool itself at the top, then a short explanation of the method, a worked example, and answers to common questions. Processing happens locally in your browser, so there's nothing to install and no account to create. The one exception is the Currency Converter, which has to fetch exchange rates.

A few tools involve precision or security, like passwords, hashes, or conversions you'll rely on. For those, the explanation on the page states exactly what method is used, so you can check the result yourself. The blog covers the trickier topics in depth, from Unix timestamps to when a paid tool is worth it.