CODDY Tool

Popular tools

The tools people open most often. This ranking is currently curated by hand; as usage data accumulates it will be derived from anonymous, aggregate counts of which tools are opened — never from anything you put into them.

Top 12

Also popular

Percentage Calculator#13

Calculator Tools

Work out percentages, discounts, tax and tips — with the working shown.

Split PDF#14

PDF Tools

Extract pages or page ranges from a PDF into new documents.

Encoding Tool#15

Developer Tools

Encode and decode Base64, URL percent-encoding and HTML entities.

Hash Generator#16

Security Tools

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files.

Date Calculator#17

Calculator Tools

Calculate the time between dates, someone's age, or a date in the future.

Text Cleaner#18

Text Tools

Strip duplicate lines, extra spaces, HTML tags and smart quotes from text.

PNG to PDF#19

PDF Tools

Convert PNG images into a PDF document with layout and background options.

Regex Tester#20

Developer Tools

Test regular expressions with live match highlighting and capture groups.

Rotate PDF#21

PDF Tools

Rotate PDF pages 90, 180 or 270 degrees — all pages or just some.

Text Diff#22

Text Tools

Compare two texts and see exactly which lines were added, removed or changed.

Timestamp Converter#23

Developer Tools

Convert Unix timestamps to dates and back, in any unit.

Image to Base64#24

Image Tools

Convert an image into a Base64 data URI for use in CSS, HTML or JSON.

Financial Calculator#25

Calculator Tools

Loan repayments, compound interest, profit margin, break-even and ROI.

Image Metadata Viewer#26

Image Tools

Inspect the EXIF data hidden inside a photo — camera, settings, date and GPS.

Text Sorter#27

Text Tools

Sort lines alphabetically, numerically or by length — or shuffle and reverse them.

QR Code Generator#28

URL & Web Tools

Create QR codes for links, text, Wi-Fi networks and contact details.

Text Converter#29

Text Tools

Convert text to and from binary, hexadecimal, Morse code and Unicode escapes.

Math Calculator#30

Calculator Tools

Roots, exponents, factorials, GCD, LCM, primes and factorisation.

Password Generator#31

Security Tools

Generate strong random passwords and memorable passphrases.

Statistics Calculator#32

Calculator Tools

Mean, median, mode, standard deviation, quartiles and outliers from any data set.

UUID Generator#33

Developer Tools

Generate UUIDs in bulk — random v4 or time-ordered v7 identifiers.

Color Converter#34

Color & Design Tools

Convert a colour between HEX, RGB, HSL, HSV, CMYK and OKLCH.

Color Palette Generator#35

Color & Design Tools

Build harmonious colour palettes from one base colour, ready to copy as CSS.

Contrast Checker#36

Color & Design Tools

Check any colour pairing against the WCAG AA and AAA contrast requirements.

CSS Generator#37

Color & Design Tools

Build CSS gradients, box shadows, text shadows and border radii visually.

Meta Tag Generator#38

SEO Tools

Generate meta, Open Graph and Twitter tags with a live search preview.

Robots.txt Generator#39

SEO Tools

Build and validate a robots.txt file, and test which paths are blocked.

Keyword Density Checker#40

SEO Tools

Find which words and phrases your text actually emphasises.

YouTube Tag Generator#41

SEO Tools

Build tag and hashtag lists that fit each platform's character budget.

Social Media Image Sizes#42

Social Media Tools

Current image dimensions and safe zones for every major platform.

Social Media Character Counter#43

Social Media Tools

Count captions and posts the way each platform actually counts them.