IT & Developer Calculators
Conversion and utility tools for building and running software.
JSON Formatter
Pretty-print and validate JSON, entirely in your browser.
Password Strength Checker
Check a password's strength based on its length and character variety.
JWT Decoder
Decode a JWT's header and payload — entirely in your browser, without verifying its signature.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text, entirely in your browser.
Unix Timestamp Converter
Convert a Unix timestamp into a readable UTC date and time.
Binary Calculator
Convert a decimal number to binary, octal and hexadecimal.
Uptime / SLA Calculator
Convert an uptime percentage (SLA) into allowed downtime per year and month.
Password Entropy Calculator
Measure password strength in bits of entropy from length and character set.
URL Encoder / Decoder
Percent-encode text for safe use in a URL, or decode a percent-encoded string back to plain text.
Hex Calculator
Convert a hexadecimal value to decimal, binary and octal.
RAID Calculator
Find usable storage capacity for a RAID array from disk count, disk size and RAID level.
ASCII Converter
Convert text to character codes, or character codes back to text.
Aspect Ratio Calculator
Scale a resolution to a new width while keeping the same aspect ratio.
Download Time Calculator
Estimate how long a file takes to download at a given connection speed.
XML Formatter
Re-indent XML into a readable, nested format.
File Download Time Calculator
Estimate how long a file takes to download at a given connection speed.
Reading Time Calculator
Estimate how long an article or document takes to read from its word count.
Cloud Server Cost Calculator
Estimate the monthly cost of an hourly-billed cloud server.
Data Storage Converter
Convert between bytes, kilobytes, megabytes, gigabytes and terabytes.
Screen DPI Calculator
Find a screen's pixel density (PPI) from its resolution and diagonal size.
Megapixel Calculator
Find the total megapixels of an image or camera sensor from its resolution.
API Rate Limit Calculator
Convert an API rate limit into requests per second and per day.
Downtime Cost Calculator
Estimate the revenue lost during a service outage.
UTF-8 Byte Converter
See the raw UTF-8 byte sequence for any text, including multi-byte characters like emoji.
Typing Speed (WPM) Calculator
Find your typing speed in words per minute from characters typed and time taken.
API Cost Calculator
Estimate the monthly cost of a pay-per-call API from your expected call volume.
Video Bitrate Calculator
Find the bitrate needed to hit a target file size for a given video length.
Page Weight Budget Calculator
Find the maximum page size that still loads within a target time on a given connection.
Frame Time Calculator
Convert a frame rate (FPS) into the time budget per frame, in milliseconds.
Compression Ratio Calculator
Find the compression ratio and space saved between an original and compressed file size.
Cron Job Frequency Calculator
Find how many times a scheduled job runs per day and per month from its interval.