Disclaimer: These tools are provided for convenience and may contain errors. Always verify important results independently. Report issues.
Fastmail

Welcome to DevTools

Select a tool from the sidebar to get started.

Tap the menu button (โ˜ฐ) or a category below to get started.

๐Ÿ“

Text Tools

Case conversion, JSON formatting, diff checking, and more.

๐ŸŽจ

Web Tools

Color conversion, CSS generators, URL encoding.

๐Ÿ“Š

Data Tools

Convert between JSON, CSV, YAML, XML formats.

๐Ÿ”

Security Tools

Password generation, hashing, JWT debugging.

๐Ÿ”ข

Math Tools

Base conversion, timestamps, bitwise operations.

๐Ÿ–ฅ๏ธ

DevOps Tools

Cron expressions, IP calculations, HTTP codes.

Big O Complexity Cheat Sheet

Data Structure Access Search Insert Delete
ArrayO(1)O(n)O(n)O(n)
Linked ListO(n)O(n)O(1)O(1)
Hash TableN/AO(1)O(1)O(1)
Binary Search TreeO(log n)O(log n)O(log n)O(log n)
AVL TreeO(log n)O(log n)O(log n)O(log n)
B-TreeO(log n)O(log n)O(log n)O(log n)
QueueO(n)O(n)O(1)O(1)
StackO(n)O(n)O(1)O(1)
Sorting Algorithm Best Average Worst Space
Merge SortO(n log n)O(n log n)O(n log n)O(n)
Quick SortO(n log n)O(n log n)O(nยฒ)O(log n)
Heap SortO(n log n)O(n log n)O(n log n)O(1)
Bubble SortO(n)O(nยฒ)O(nยฒ)O(1)
Insertion SortO(n)O(nยฒ)O(nยฒ)O(1)
Selection SortO(nยฒ)O(nยฒ)O(nยฒ)O(1)
Radix SortO(nk)O(nk)O(nk)O(n+k)

Recommended

Algorithms Computer Science Books
Browse algorithms computer science books on Amazon
Amazon amazon.com
Essential for developers
Fastmail โ€” Private Email
Privacy-first email with no ads and no tracking
fastmail.com
Dynadot โ€” Domain Registration โ†’
Register or transfer domains with free SSL and affordable pricing
dynadot.com
Zen Internet โ€” UK Broadband โ†’
Award-winning UK broadband with no data caps and great customer service
zen.co.uk
We may earn a commission if you purchase through these links.

Cron Job Expression Generator

Recommended

Browse Git Version Control Books โ†’
Browse git version control books on Amazon
Amazon amazon.com
Essential for developers
Fastmail โ€” Private Email
Privacy-first email with no ads and no tracking
fastmail.com
Dynadot โ€” Domain Registration โ†’
Register or transfer domains with free SSL and affordable pricing
dynadot.com
Zen Internet โ€” UK Broadband โ†’
Award-winning UK broadband with no data caps and great customer service
zen.co.uk
We may earn a commission if you purchase through these links.