The full tools index

STU

GPA Calculator

Semester GPA from grades and credit hours.

STU

CGPA Calculator

Cumulative GPA across semesters.

STU

Semester Planner

Lay out a term's courses and workload.

STU

Attendance Calculator

Track how much you can miss and stay eligible.

STU

GPA Predictor

Project your CGPA before results are out.

STU

Credit Hour Calculator

Work out total credit hours for a plan.

STU

Exam Score Predictor

Estimate the score you need on what's left.

STU

Grade & Percentage Calculator

Convert marks to a grade and percentage.

STU

Exam Retake Calculator

See how a retake changes your average.

STU

Transcript Generator

Build a printable transcript as a PDF.

STU

Time Table Maker

Lay out a weekly class schedule.

STU

Student Budget Planner

Track income and spending by term.

STU

Scientific Calculator

Trig, logs and exponents in the browser.

STU

Typing Speed Test

Measure WPM and accuracy on a passage.

DEV

JSON Formatter

Validate and pretty-print JSON.

DEV

XML to JSON Converter

Convert between XML and JSON.

DEV

Base64 Studio

Encode, decode and preview Base64 data.

DEV

URL Encoder Decoder

Percent-encode or decode a URL.

DEV

HTML Entity Encoder

Escape or unescape HTML entities.

DEV

Markdown to HTML

Live preview while you write Markdown.

DEV

CSS Minifier

Minify or beautify a CSS file.

DEV

JavaScript Minifier

Shrink a JS file for production.

DEV

SQL Formatter

Beautify a messy SQL query.

DEV

Code Diff Checker

Compare two code blocks side by side.

DEV

Regex Tester

Test a pattern against sample text live.

DEV

JWT Token Decoder

Inspect the header and payload of a JWT.

FIN

EMI Calculator

Monthly loan instalments and total interest.

FIN

Compound Interest

Project investment growth over time.

FIN

Simple Interest Calculator

Basic loan interest math.

FIN

Mortgage Refinance Calculator

Find your refinance break-even point.

FIN

Rent vs Buy Calculator

Compare renting against buying over time.

FIN

Car Loan Calculator

Estimate auto loan payments.

FIN

Credit Card Payoff Calculator

See your debt-free date at a given payment.

FIN

Retirement Savings Calculator

Project a 401(k) or IRA balance.

FIN

Net Worth Calculator

Assets minus liabilities, tracked over time.

FIN

Savings Goal Calculator

Time to reach a savings target.

FIN

Break Even Calculator

Find the break-even point for a business.

FIN

Crypto Profit Calculator

Gains across Bitcoin and altcoin trades.

HLT

BMI Calculator

Check BMI against standard categories.

HLT

BMR Calculator

Basal metabolic rate at rest.

HLT

TDEE Calculator

Total daily energy expenditure.

HLT

Macro Calculator

Protein, carb and fat split for a target.

HLT

Body Fat Calculator

Navy and IOM method estimates.

HLT

Ideal Weight Calculator

Compare several standard formulas.

HLT

Calorie Burn Calculator

Estimate calories burned by activity.

HLT

Heart Rate Zone Calculator

Training zones from age and rest rate.

HLT

Sleep Cycle Calculator

Optimal wake times by sleep cycle.

HLT

Water Intake Calculator

Daily hydration target by weight and activity.

UTL

Image Compressor

Shrink image file size in your browser.

UTL

QR Code Generator

Turn a link or text into a QR code.

UTL

Time Zone Converter

Convert a time across zones.

UTL

Word Counter

Count words and read text aloud.

UTL

PDF to Image

Export PDF pages as images.

UTL

Image Upscaler

Increase image resolution.

UTL

Countdown Timer

Track time to an upcoming event.

UTL

Online Notepad

A notepad that autosaves as you type.

UTL

Password Generator

Strong random passwords, instantly.

UTL

Unit Converter

Length, weight and temperature units.

UTL

Age Calculator

Exact age, down to the second.

UTL

Resume Builder

Build a clean, printable resume.

DSN

Color Palette Generator

Pull a palette from an image, or randomize.

DSN

CSS Gradient Generator

Build and copy a CSS gradient.

DSN

Flexbox Generator

Visually build a CSS flex layout.

DSN

Grid Layout Generator

Visually build a CSS grid layout.

DSN

Favicon Generator

Export a favicon in every needed size.

DSN

App Icon Generator

iOS and Android icon sizes at once.

DSN

Image Collage Maker

Arrange photos into a grid collage.

DSN

Quote Image Generator

Turn a quote into a shareable graphic.

DSN

Color Contrast Checker

Check a color pair against WCAG.

DSN

Instagram Post Maker

Square templates sized for Instagram.

EML

Email Header Analyzer

Trace the route and check SPF, DKIM, DMARC.

EML

SPF Record Checker

Validate SPF and count DNS lookups.

EML

DKIM Record Checker

Validate a DKIM key by selector.

EML

DMARC Record Checker

Check policy, reports and alignment.

EML

Email Health Check

SPF, DKIM, DMARC and MX in one scan.

EML

MX Record Lookup

Find mail servers and check they resolve.

EML

Reverse DNS Lookup

Find the PTR record for an IP.

EML

DNS Propagation Checker

Compare answers from public resolvers.

EML

Domain Blacklist Check

Check spam blocklists for a domain or IP.

EML

SPF Record Generator

Build a valid SPF record.

EML

DMARC Record Generator

Create a DMARC policy record.

EML

BIMI Record Generator

Build the record and prepare your SVG logo.

EML

BIMI Logo Maker

Make a BIMI-ready SVG logo and download it.

EML

CAA Record Checker

Which CAs may issue your SSL certificates.

EML

BIMI Record Checker

Check your brand logo record and its DMARC need.

EML

MTA-STS & TLS-RPT Checker

Check forced-TLS mail policy and its reports.

EML

DNSSEC Checker

Verify the DS and DNSKEY chain of trust.

SEO

Meta Tag Generator

Title, description and viewport tags for a page.

SEO

Open Graph Generator

Social share tags for Facebook, X and LinkedIn.

SEO

Schema Markup Generator

JSON-LD structured data for rich results.

SEO

Robots.txt Generator

Tell crawlers what to crawl and what to skip.

SEO

HTTP Status Checker

Status codes, redirect chains and timing.

SEO

Website Speed Tester

Response time and page size for any URL.

SEO

SSL Certificate Checker

Expiry, names and issuer of a certificate.

SEO

Sitemap XML Generator

Build a valid sitemap.xml from a list of URLs.

SEO

Canonical & Hreflang Generator

Canonical and language-alternate tags for a page.

SEO

Redirect (.htaccess) Generator

301 and 302 redirect rules for Apache.

SEO

SERP Snippet Preview

See how a title and description look in Google.

SEO

Keyword Density Checker

Count word and phrase frequency in your text.

SEO

UTM Link Builder

Add campaign tracking to any URL.

SEO

Heading Structure Checker

Check H1 to H6 order on a page.

SEO

Structured Data Validator

Check JSON-LD for errors and missing fields.

SEO

Slug Generator

Turn a title into a clean URL slug.