Tools List
Browse the current Truthy Tools directory.
Explore 161 active Truthy Tools across 26 categories, including developer utilities, calculators, converters, lookup references, encoding helpers, date and time tools, color utilities, and agent-friendly shortcuts for common debugging, formatting, validation, and planning workflows.
161 tools
26 categories
Age
Calculate exact elapsed age from any date with a live breakdown and aggregate totals for years, months, days, hours, minutes, and seconds.
/age
AM PM
Check whether your current local time is AM or PM and copy a simple time-of-day label for clocks, forms, or quick references.
/am-pm
Area Converter
Convert between square meters, square feet, square yards, acres, hectares, square kilometers, and square miles simultaneously.
/area
ASCII
Search the standard ASCII table by decimal, hex, binary, symbol, or control name and copy values for code, terminal, and data tasks.
/ascii
Aspect Ratio Calculator
Enter any two dimensions to get the simplified ratio, decimal ratio, orientation, and scaled equivalents at common screen sizes.
/aspect-ratio
Astrology Signs
Enter a birth date to find its zodiac sign, then browse date ranges, elements, qualities, and ruling planets for all 12 astrology signs.
/astrology-signs
Astronomical Seasons
Find the current astronomical season from calculated equinox and solstice boundaries in either hemisphere.
/seasons-astronomical
Base32
Encode text to RFC 4648 Base32 or decode Base32 back to UTF-8 text with padding controls, validation errors, and copyable output.
/base32
Base58
Encode text to Base58, decode Base58 back to UTF-8 text, or validate Bitcoin and Flickr alphabet strings with clear invalid-character messages.
/base58
Base64
Encode plain text to Base64 or decode Base64 back to readable text with copyable output for payloads, headers, and quick tests.
/base64
BMI
Calculate body mass index from US or metric height and weight inputs, then review the BMI category and reusable measurement breakdown.
/bmi
Boolean
Randomly choose True or False for lightweight decisions, test data, examples, probability demos, or yes-no style placeholders.
/boolean
Break Even
Find the costs, price, contribution margin, and unit volume needed to break even or hit a target profit.
/break-even
Browser Info
Inspect browser name, platform, language, cookie support, touch support, online status, and user agent details from the current session.
/browser-info
Calendar Month
Inspect any calendar month with week rows, weekday counts, quarter, day-of-year context, and month boundary details.
/calendar-month
Case Converter
Convert text between uppercase, lowercase, sentence, title, camel, pascal, snake, kebab, constant, and other developer naming styles.
/case-converter
Character Counter
Count characters, words, sentences, paragraphs, lines, reading time, speaking time, and density stats for drafts or pasted text.
/character-counter
Character Encoding
Look up character encodings and charset labels for HTML, HTTP headers, text files, and legacy data import or export workflows.
/character-encoding
Charset Inspect
Inspect every character in pasted text with Unicode code points, names, categories, UTF-8 byte lengths, and hidden character warnings.
/charset-inspect
CIDR Calculator
Enter an IPv4 CIDR block and get the network address, broadcast address, subnet mask, usable host range, and host count.
/cidr
Coin Flip
Flip a virtual coin to get Heads or Tails for quick decisions, games, classroom probability examples, or random binary choices.
/coin-flip
Color Blindness Simulator
Enter a HEX color and preview how it appears under protanopia, deuteranopia, tritanopia, and achromatopsia for accessible design.
/color-blindness
Color Contrast
Check text and background colors for contrast ratio, WCAG readability levels, and accessible UI color pairing decisions.
/color-contrast
Color Converter
Convert a color between HEX, RGB, HSL, CMYK, and OKLCH-style CSS values for design and development handoff.
/color-converter
Color Grid
Pick colors from a visual grid and copy HEX, RGB, or HSL values for palettes, CSS experiments, and design references.
/color-grid
Color Mixer
Blend two colors by percentage and copy the resulting HEX, RGB, or HSL value for gradients, palettes, and UI experiments.
/color-mixer
Color Name Finder
Find the closest human-readable color name for a HEX value with an approximate named-color match and distance score.
/color-name
Color Palette Generator
Create analogous, complementary, triadic, and monochrome palettes from one seed color for quick visual exploration.
/color-palette
Color Shade Generator
Enter a base HEX color and generate a full 50–950 tint and shade scale. Click any swatch to copy its value, or export as CSS variables, JSON, or Tailwind confi…
/color-shades
Color Sliders
Adjust RGB, CMYK, HSB, and grayscale sliders while viewing HEX, RGB, and HSL output for fast color exploration and copying.
/color-sliders
Color Themes
Browse seasonal and mood-based color palettes for spring, summer, autumn, winter, calm, and bold design directions.
/color-themes
Content Encoding
Browse HTTP content encodings for compression, transfer, escaping, and binary-to-text workflows with sortable names and copyable values.
/content-encoding
Content Types
Search common HTTP content types and MIME strings by name, extension, or media type for headers, uploads, and API responses.
/content-types
CORS Headers
Reference CORS request and response headers with examples for origins, preflight checks, credentials, methods, and browser errors.
/cors-headers
Countdown Timer
Set a countdown by hours, minutes, and seconds, or pick a quick preset, then watch a visual progress bar and get a browser notification when time runs out.
/countdown
Country Codes
Look up countries by ISO alpha, numeric code, calling code, region, and name so international identifiers are easy to copy.
/country-codes
Crayon Colors
Explore classic crayon color names with HEX, RGB, and HSL values for playful palettes, naming inspiration, and quick CSS copying.
/crayon-colors
Cron Explainer
Explain cron fields in plain language and preview recent plus upcoming scheduled times so recurring jobs are easier to verify.
/cron-explainer
Cron Runs
Validate a cron expression and calculate previous plus next run times to confirm schedules before deploying jobs or alerts.
/cron-runs
CSS Unit Converter
Convert CSS sizes across px, rem, em, vw, vh, vmin, vmax, and percentages using editable root font, parent, and viewport context.
/css-unit-converter
cURL Command Builder
Select a method, enter a URL, add headers and body, and generate a ready-to-paste cURL command with options for verbose, follow redirects, include headers, and…
/curl-builder
Data Size Converter
Convert data sizes between bytes, decimal KB through PB, and binary KiB through PiB for storage, bandwidth, and file estimates.
/data-size-converter
Date Adjuster
Add or subtract days from any date to find deadlines, renewal windows, offsets, and milestone dates with clear copyable results.
/date-adjuster
Date Diff
Calculate days between two dates with inclusive or exclusive counting, calendar direction, and clear totals for planning timelines.
/date-diff
Date Format Reference
Browse common date format tokens for moment.js, Day.js, date-fns, strftime, SQL, and ISO 8601 — with live examples for any date you choose.
/date-format
Day of Year
Find the current day number of the year, remaining days, and local date context for progress tracking or calendar references.
/day-of-year
Dev Colors
Browse developer system color names with HEX, RGB, and HSL values for UI mockups, CSS variables, terminal palettes, and design notes.
/dev-colors
Dice Roll
Roll one or two six-sided dice and show totals for quick games, probability examples, classroom activities, or random decisions.
/dice-roll
DNS Lookup
Enter a domain and query type to fetch live DNS records including A, AAAA, MX, TXT, CNAME, NS, SOA, and CAA via Cloudflare's DNS-over-HTTPS resolver.
/dns-lookup
DNS Propagation
Review DNS propagation, resolver caching, TTL, nameserver, zone, and cutover terms used during domain or record changes.
/dns-propagation
DNS Record Types
Look up DNS record types such as A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, and CAA with practical usage notes.
/dns-record-types
Effort Impact
Rank ideas by Priority Score using Impact divided by Effort so high-impact low-effort work rises to the top.
/effort-impact
Email Address Parts
Parse email addresses into local part, mailbox, plus tag, domain, subdomain, root domain, and TLD for validation notes.
/email-address-parts
Empty Values
Compare empty, blank, null, undefined, missing, and empty-like values across common development contexts and data checks.
/empty-values
Encrypt Hash
Generate SHA-256, SHA-512, and HMAC-SHA256 hashes from text for checksums, signing examples, and repeatable copyable digests.
/encrypt-hash
Equinox Date
Find the next or last March or September equinox and calculate how many days away it is.
/date-equinox
Error Codes
Search HTTP error and status codes by number, class, meaning, and examples to understand 4xx and 5xx response behavior.
/error-codes
Fibonacci Sequence
Generate up to 100 terms of the Fibonacci sequence with a running total and golden ratio approximation at each step. Export as CSV or copy the sequence.
/fibonacci
File Extensions
Search file extensions by suffix, type, MIME hint, or category to identify formats, uploads, downloads, and data files.
/file-ext
Fraction Calculator
Convert fractions to decimals and back, simplify to lowest terms, and add, subtract, multiply, or divide two fractions with a step-by-step breakdown.
/fraction
Fuel Economy
Convert vehicle efficiency between MPG, km/L, and L/100km with separate US and Imperial gallon support for accurate fuel comparisons.
/fuel-economy
Git Reference
Search common Git commands with examples, descriptions, flags, and notes for everyday branching, commits, remotes, and history tasks.
/git-ref
Google Drive File Links
Extract a Google Drive file ID and generate view, preview, direct download, and export links for sharing or embedding files.
/gdrive-file-links
Half Birthday
Calculate half birthdays from any date, including the next and previous half birthday plus days remaining for planning reminders.
/half-birthday
HTML Remover
Strip HTML tags from pasted markup and return readable plain text for emails, snippets, CMS content, or quick cleanup before copying.
/html-remover
HTML to Markdown
Convert HTML fragments into Markdown for documentation, notes, README files, migrations, and publishing workflows with clean output.
/html-to-markdown
HTTP Methods
Compare HTTP methods such as GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS with typical REST API usage notes.
/http-methods
HTTP Redirect Codes
Deep-dive reference on 301, 302, 303, 307, and 308 — covering differences, use cases, SEO implications, browser caching behavior, and common mistakes.
/http-redirects
ICE Score
Prioritize ideas by scoring Impact, Confidence, and Ease from 1 to 10, then rank ideas by their calculated ICE score.
/ice-score
IP Address
Parse IPv4 and IPv6 addresses, spot private or reserved ranges, expand compressed IPv6 notation, and copy normalized network details.
/ip-address
ISO Duration
Parse an ISO 8601 duration string into labeled components with a human-readable summary, or build a duration string from year, month, week, day, hour, minute,…
/iso-duration
JSON Formatter
Pretty-print, minify, and validate JSON with readable indentation, parsing errors, and copy-ready output for API debugging.
/json-formatter
JSON to XML
Convert valid JSON objects or arrays into formatted XML output for data exchange, examples, quick migrations, and copyable snippets.
/json-to-xml
JWT Codec
Encode or decode JWT header, payload, and signature sections to inspect claims, JSON structure, and token parts during debugging.
/jwt-codec
JWT Expiry
Decode a JWT and inspect its expiry status, time remaining, issued-at, not-before, subject, issuer, and algorithm claims without signature verification.
/jwt-expiry
KSUID
Generate K-Sortable Unique IDs, validate KSUID strings, decode embedded UTC timestamps, and copy batches for logs, fixtures, and database records.
/ksuid
Leap Year
Check whether a year is a leap year and see nearby leap years with the calendar rule used for February 29 planning.
/leap-year
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles simultaneously. Edit any field to update all others.
/length
Lorem Ipsum
Generate lorem ipsum placeholder text by words, sentences, or paragraphs for mockups, layouts, wireframes, and content tests.
/lorem-ipsum
Magic 8 Ball
Get a random Magic 8 Ball style answer for playful decisions, prompts, games, or quick uncertainty-themed responses.
/magic-8-ball
Markdown to HTML
Convert Markdown into clean HTML for documentation, README files, notes, previews, and publishing workflows with copy-ready output.
/markdown-to-html
Meteorological Seasons
Find the current meteorological season using fixed three-month blocks in either hemisphere.
/seasons-meteorological
MIME Types
Search MIME media types by extension, content type, category, or name for HTTP headers, uploads, downloads, and APIs.
/mime-types
Morse Code Translator
Convert text to Morse code dots and dashes and back, with correct word spacing rules, an inline reference chart, and a copyable output.
/morse-code
NanoID Generator
Generate URL-safe random IDs with a configurable alphabet and length. Choose from preset alphabets or define your own, and generate single or batch outputs.
/nanoid
Now
Show the current moment as ISO time, Unix seconds, Unix milliseconds, and friendly local output for logs or timestamp copying.
/now
Number Base Converter
Convert integers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) by editing any field.
/number-base
Number to Words
Convert integers like 1,234,567 to "one million two hundred thirty-four thousand five hundred sixty-seven." Includes ordinal and check-style formatting.
/number-words
Odd Even
Randomly choose Odd or Even for games, classroom examples, binary picks, quick wagers, or probability demonstrations.
/odd-even
Payback Period
Calculate the time needed to recover an upfront cost from recurring savings and revenue benefits.
/payback-period
Percent Calculator
Calculate percent-of answers, X as a percent of Y, and percent change for tips, tax, discounts, grades, and quick everyday math.
/percent-calculator
Phone Formats
Format phone numbers as national, international, E.164, digits-only, and display variants for contact records or examples.
/phone-formats
Phone Number Parts
Parse phone numbers into country code, area code, prefix, line number, extension, and normalized formats for validation notes.
/phone-number-parts
Pi Digits
Display pi to a selected number of decimal digits, with a default of 10 and a maximum of 1,000.
/pi
PIE Score
Prioritize ideas by scoring Potential, Importance, and Ease from 1 to 10, then rank work by the calculated PIE score.
/pie-score
Pixel Ratio
View device pixel ratio, viewport size, screen dimensions, and estimated physical pixels for responsive design checks.
/pixel-ratio
Pomodoro Timer
Stay focused with configurable work and break intervals, a visual countdown, session counter, and browser notifications when each phase ends.
/pomodoro
Primary Colors
Search primary-style color names and compare HEX, RGB, and HSL values for simple palettes, teaching references, or design drafts.
/primary-colors
Prime Number Checker
Enter any positive integer up to 10,000,000 to check if it's prime, see its factors and prime factorization, and find the nearest primes.
/prime-checker
Pros Cons
Compare a decision with pros on the left, cons on the right, live item counts, balance tracking, and copyable summary output.
/pros-cons
Random Card
Draw a random card from a standard 52-card deck with suit and rank for games, simulations, teaching, or quick draws.
/random-card
Random Color
Generate a random color and copy its HEX, RGB, HSL, or CSS value for palettes, mockups, demos, and design experiments.
/random-color
Random Coordinates
Generate random latitude and longitude values with a ready-to-open Google Maps link for geography prompts or map experiments.
/random-coordinates
Random Direction
Randomly choose Left, Right, Up, Down, Forward, or Backward for games, movement prompts, classroom activities, or decisions.
/random-direction
Random Emoji
Show a random emoji from a curated set for prompts, reactions, placeholders, playful UI states, or quick creative inspiration.
/random-emoji
Random Letter
Generate a random letter from A to Z for games, classroom activities, writing prompts, sorting examples, or quick picks.
/random-letter
Random Number
Generate random whole integers across common ranges for test data, quick picks, classroom examples, games, or probability demos.
/random-number
Random Password
Generate secure random passwords with practical presets and server-side crypto for accounts, tests, or temporary credentials.
/random-password
Regex Explainer
Break down a regular expression into tokens, groups, quantifiers, anchors, escapes, and flags so patterns are easier to understand.
/regex-explainer
Relative Time Formatter
Enter any past or future timestamp and get the '3 hours ago' or 'in 2 days' style relative output, plus totals in seconds, minutes, hours, days, and Unix times…
/time-ago
RICE Score
Prioritize ideas by scoring Reach, Impact, Confidence, and Effort, then rank work by the calculated RICE score.
/rice-score
Rock Paper Scissors
Generate a random Rock, Paper, or Scissors pick with running counts and percentages for games, tiebreakers, and quick decisions.
/rock-paper-scissors
ROI
Calculate return on investment from gain and cost values, including ROI percentage, net profit, and copyable finance summary outputs.
/roi
Roman Numeral Converter
Convert integers to Roman numerals and back. Supports 1–3,999 with a full breakdown of each numeral component and its value.
/roman-numerals
Screen Size
View current viewport, screen dimensions, pixel ratio, and orientation for responsive layout checks and browser debugging.
/screen-size
Seasons
Compare astronomical seasons based on equinoxes and solstices with meteorological fixed three-month seasons.
/seasons
SemVer
Reference semantic version parts, range operators, prerelease labels, build metadata, compatibility rules, and version bump choices.
/semver
Shuffle Deck
Shuffle a standard 52-card deck and list every card by position for games, simulations, classroom activities, or random draws.
/shuffle-deck
Slugify
Turn titles or pasted text into clean URL slugs, filename-safe strings, lowercase paths, and separator styles ready for publishing.
/slugify
Snowflake ID
Decode Snowflake IDs with configurable epoch, worker/process bits, and sequence bits to reveal embedded timestamps and identifier parts.
/snowflake-id
Solstice Date
Find the next or last June or December solstice and calculate how many days away it is.
/date-solstice
Speed
Convert speed units between meters per second, feet per second, kilometers per hour, and miles per hour with instant reciprocal results.
/speed
SRI Hash
Generate SHA-256, SHA-384, and SHA-512 Subresource Integrity hashes from pasted asset content with copyable script and stylesheet examples.
/sri-hash
Status Codes
Search HTTP status codes by code, meaning, category, cause, and example to troubleshoot responses or learn API behavior.
/status-codes
Stopwatch
Start, pause, and reset a precise stopwatch with lap tracking that highlights the fastest and slowest splits alongside running totals.
/stopwatch
SWOT
Capture strengths, weaknesses, opportunities, and threats in a classic 2x2 planning grid with copyable Markdown output.
/swot
TAM SAM SOM
Estimate total available market, serviceable available market, and serviceable obtainable market from customer and revenue assumptions.
/tam-sam-som
Temperature
Convert Fahrenheit, Celsius, and Kelvin values with instant reciprocal results for weather, science, cooking, or reference tasks.
/temperature
Time
Show current local time in 12-hour, 24-hour, and military formats with seconds for quick clock checks and copyable display values.
/time
Time Savings
Estimate automation or process improvement savings using hours saved, hourly rate, and repeat frequency per period.
/time-savings
Time Zones
Search IANA time zones by region, city, abbreviation, UTC offset, current time, and DST status for scheduling across locations.
/time-zones
Timestamp Parts
Parse timestamps into date, time, Unix seconds, milliseconds, UTC, local, and timezone parts for logs or event debugging.
/timestamp-parts
Timezone
Compare current times, offsets, abbreviations, DST status, and differences across global IANA time zones for scheduling.
/timezone
Tip Calculator
Calculate tips from common shortcut percentages, adjust by one percent, round totals for easy math, and split bills evenly by group size.
/tip-calculator
Today
Show today’s date with year, month, day, weekday, ISO, and calendar breakdown for forms, reports, and quick copy tasks.
/today
Tomorrow
Show tomorrow’s date with year, month, day, weekday, ISO, and relative details for planning, reminders, or date copying.
/tomorrow
Truthy Falsy
Reference common JavaScript truthy and falsy values with explanations for conditionals, coercion checks, and debugging examples.
/truthy-falsy
TZ ISO Unix
View local timezone, ISO timestamp, Unix seconds, Unix milliseconds, and offset details for logs, APIs, or copyable time values.
/tz-iso-unix
ULID
Generate ULIDs, decode their embedded Unix millisecond timestamps, validate input, and produce copy-ready batches.
/ulid
Unicode Normalizer
Normalize pasted text into NFC, NFD, NFKC, and NFKD forms while comparing code point changes for Unicode debugging.
/unicode-normalizer
Unix Permissions
Look up Unix permission bits, symbolic modes, chmod values, owner group other rules, and common file access examples.
/unix-permissions
Unix Time
Convert Unix seconds or milliseconds into ISO, UTC, local, and relative time, or inspect epoch values from logs and APIs.
/unix-time
URL Codec
Encode and decode URL strings, query values, URI components, reserved characters, and percent-escaped text for web requests.
/url-codec
URL Encodings
Reference percent-encoded URL characters with decoded symbols and examples for query strings, paths, forms, and HTTP debugging.
/url-encodings
URL Parts
Parse a URL into scheme, host, port, path, query parameters, hash, origin, and decoded pieces for troubleshooting links.
/url-parts
URL Tracer
Trace a URL through redirects, inspect each hop, final destination, status behavior, and chain details for link debugging.
/url-tracer
US States
Search US states, territories, districts, and federal areas by abbreviation, capital, region, division, and type for reference.
/us-states
User Agent
View and copy your browser user agent string for support tickets, browser detection tests, analytics, and debugging notes.
/user-agent
UTM Builder
Build encoded campaign URLs with UTM source, medium, campaign, term, and content fields, then copy the final tracking link.
/utm-builder
UUID
Generate random UUID v4 and timestamp-sortable UUID v7 identifiers with copyable values for tests, records, or database keys.
/uuid
UUID Decoder
Decode UUID strings to identify version, variant, canonical format, and embedded timestamp details when the UUID type supports it.
/uuid-decoder
UUID v4
Generate random UUID version 4 identifiers with copy-ready output for test data, fixtures, request IDs, and application records.
/uuid-v4
UUID v7
Generate timestamp-sortable UUID version 7 identifiers with embedded time ordering for logs, databases, and distributed systems.
/uuid-v7
UUID Versions
Compare UUID versions with sample values, version purposes, timestamp behavior, and notes for choosing identifier formats.
/uuid-versions
Viewport
Check current browser viewport width, height, orientation, and scroll position for responsive design and layout debugging.
/viewport
Volume Converter
Convert between liters, milliliters, gallons, quarts, pints, cups, tablespoons, teaspoons, and fluid ounces simultaneously.
/volume
Web Safe Colors
Search the 216 classic web-safe colors by name or value and copy HEX, RGB, and HSL references for retro-safe palette work.
/web-safe-colors
Week Number
View the current ISO week number with local date context for planning, reports, sprint naming, and calendar references.
/week-number
Weight Converter
Convert between milligrams, grams, kilograms, ounces, pounds, stones, and metric tons simultaneously. Edit any field to update all others.
/weight
XML to JSON
Convert valid XML into formatted JSON with parsed structure for API examples, migrations, data inspection, and quick copying.
/xml-to-json
Yesterday
Show yesterday’s date with year, month, day, weekday, ISO, and relative details for quick reporting or calendar checks.
/yesterday