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🏠 Home, food & hobbiesFree
Board game playtime calculator
A game that takes 60 minutes with 2 players comes to 96 minutes with 5, if each extra player adds 12.
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🏠 Home, food & hobbiesFree
Card game deck mana curve calculator
A 100-card deck with an average cost of 3.33 is split into eight cost groups, and any group 10 percentage points away from the reference shape is flagged.
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🏠 Home, food & hobbiesFree
D&D Encounter Difficulty Calculator and XP Budget
Four level-3 characters against two CR 1 monsters is a medium fight: 400 monster XP becomes 600 after the group multiplier, right at the party's medium…
F
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🏠 Home, food & hobbiesFree
Video Game Backlog Completion Time Calculator
Three games of 18, 27.5 and 12 hours at 10 hours a week take 5.75 weeks, so the list is done in week 6.
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🏠 Home, food & hobbiesFree
Raffle ticket number generator
Start at 98, ask for 5 tickets with a width of 6, and you get 000098 to 000102, each number exactly once.
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🏠 Home, food & hobbiesFree
Seeded random team generator
Split seven people into three teams and you get groups of three, two and two; reuse the same list and the same seed and you get exactly the same teams again, so…
B
Runs in your browser
🏠 Home, food & hobbiesFree
Trivia night round scoring calculator with wagers and leaderboard
Enter your rounds, mark each team's answers right or wrong and add the final wager: in the sample game two teams finish tied on 45 and share first place, while…
F
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🏠 Home, food & hobbiesFree
Build a book club reading schedule with meeting checkpoints
A 320-page book read at 12 pages a day with meetings every 14 days becomes two checkpoints: pages 1 to 168, then 169 to 320.
B
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🏠 Home, food & hobbiesFree
Candle Burn Time Remaining and Wax Estimate Calculator
A candle rated for 50 hours that has burned 12.5 has 37.5 hours, or 75 %, left; add its 320 g of wax and you get an estimated 240 g remaining.
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Runs in your browser
🏠 Home, food & hobbiesFree
Compare appliance total cost of ownership over a fair lifespan
If appliance A lasts 12 years and B lasts 8, both are compared over 8 years of energy plus their purchase price.
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🏠 Home, food & hobbiesFree
Battery replacement annualized cost calculator
A battery rated for 1000 cycles and used 250 times a year lasts 4 years, so a quarter of its price falls on each year.
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🏠 Home, food & hobbiesFree
Garden bed plant spacing calculator
A bed 240 cm by 120 cm planted 30 cm apart fits 8 rows by 4 columns: 32 plants with no space left over.
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🏠 Home, food & hobbiesFree
Calculate grass seed coverage needed for a lawn
A 5,000 square foot lawn with seed that covers 1,000 square feet per pound needs 5 pounds for a new lawn, or 3 pounds to overseed at 60% of that rate.
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🏠 Home, food & hobbiesFree
Calculate mulch volume needed for a garden bed in cubic feet and bags
A 240 square foot bed covered 3 inches deep needs 60 cubic feet of mulch, exactly 30 bags of 2 cubic feet.
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🏠 Home, food & hobbiesFree
Calculate a seed-starting date from the last frost
With an average last frost on April 20, 2026 and a packet that says 8 weeks indoors, start seeds on February 23, 2026, which is 56 days earlier.
K
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🖼️ ImagesFree
Check icon alignment to grid
Check whether an icon's four edges sit on your grid: with an 8-unit grid and a tolerance of 0.02, edges at 16.02, 7.99, 47.98 and 40.01 all pass, and any edge…
B
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🖼️ ImagesFree
Logo minimum clear space calculator
Turn a brand rule like 1.5 times the x-height into an exact distance: a 120-pixel logo with a 24-pixel x-height needs 36 pixels of clear space on every side…
K
Runs in your browser
🖼️ ImagesFree
Build a placeholder image specification with dimensions and colors
Ask for a 640 × 360 placeholder and get the canvas size, colors written one consistent way such as #1A2B3C, and a «640 × 360» label centered at 320, 180.
K
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🏠 Home, food & hobbiesFree
Daily affirmation picker
Pick a date and a category and get one affirmation that stays fixed for that day: 2026-08-03 in the confidence category always returns a line about handling…
R
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🏠 Home, food & hobbiesFree
Seeded icebreaker question picker for work, parties, and family
The work list with the seed “monday-team-sync” always opens with “Which skill would you most like to learn from someone on this team?” Pick work, party or…
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🌐 TranslationFree
License plate generator from a pattern and seed
With the three-letters-three-digits layout, the seed demo-vehicle-42 always gives LVL-620, so screenshots and sample records stay identical on every run.
K
Runs in your browser
⚙️ Developer UtilitiesFree
Password entropy calculator
Sixteen random characters from lowercase, uppercase, digits and symbols (94 in all) give about 104.873 bits, and at 10 billion guesses per second an average…
K
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📈 SEOFree
Suggest Hashtags from Keywords
Enter keywords such as social media, Content Marketing and SEO tips and get #socialmedia, #socialMedia, #contentmarketing and the rest, each in lowercase and…
R
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❤️ Health & fitnessFree
Generate an Esports Double-Elimination Bracket
Six teams become an eight-slot double-elimination bracket: byes fill the empty slots, seed one starts opposite the last slot, losers drop into the losers…
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Runs in your browser
✍️ Text & AIFree
Emoji shortcode lookup
Type :rocket: and get 🚀, ready to copy into a message, a template or release notes. Matching is exact: names are lowercase, both colons are required, and an…
K
Runs in your browser
✅ ValidationFree
Minimum accessible font size checker for body, captions and buttons
Catch text that is too small before people struggle with it: a 13.5 px button label falls 0.5 px short of the 14 px guidance, while body text is held to 16 px…
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Runs in your browser
✅ ValidationFree
Compare two file checksums
Paste the checksum from the source and the one from the destination: 9e107d9d… and 9E107D9D… count as the same 32-character value, so a capital letter never…
R
Runs in your browser
✅ ValidationFree
Touch target size checker
A 48 by 44 point button passes the default 44 by 44 minimum on both sides; a 40 by 52 one fails and tells you to add 4 points of width.
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Runs in your browser
✅ ValidationFree
WCAG text spacing checker
A 16 pixel font with a 24 pixel line height reaches exactly 1.5, so it passes; 1.92 of letter spacing and 2.56 of word spacing pass too.
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🕸️ Web Scraping & MonitoringFree
Domain name suggestions
Turn one brand keyword into domain ideas for the extensions you choose: Bright Forge with .com and .io gives 20 names such as bright-forge.com…
K
Runs in your browser
🕸️ Web Scraping & MonitoringFree
Domain renewal cost calculator for multiple years and discounts
Turn a yearly renewal quote into a multi-year budget: enter the annual price, 3 years and a 10% discount, and see the subtotal, the amount saved and the final…
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Runs in your browser
🕸️ Web Scraping & MonitoringFree
Compare internet plan cost per Mbps
A plan of 60 a month at 300 Mbps costs 0.20 per Mbps, while one of 75 at 500 Mbps costs 0.15, so the higher bill is the better value per megabit.
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Runs in your browser
🕸️ Web Scraping & MonitoringFree
Username Generator
Type a name such as River Stone and get up to 100 username ideas, from riverstone8850 to r1verstone4760, all built around the same recognizable core.
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✍️ Text & AIFree
Generate a social bio from a template
With an 80-character limit, Maya Chen, product designer, gets a 66-character bio that keeps her first interest and drops the other two.
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Runs in your browser
✍️ Text & AIFree
Social post caption template
Pick one of three tones and your topic becomes a caption: “launching our neighborhood book exchange” in the inspirational tone closes with “Keep going.
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✍️ Text & AIFree
Generate a slogan from a template
Northstar, in project management, with the template “The Best Way to …” and seed 17 becomes “The Best Way to Plan”.
B
Runs in your browser
➗ MathFree
Lucas number calculator: L_n from L0=2, L1=1, free bigint
Get any term of the Lucas sequence exactly: it starts 2, 1, 3, 4, 7, 11, and the 10th term is 123.
S
Runs in your browser
➗ MathFree
Palindrome number checker
Check whether a number reads the same forwards and backwards in any base from 2 to 36: 121 is a palindrome in base 10, and 5 is one in base 2, written…
A
Runs in your browser
🖼️ ImagesFree
Cividis colormap sample
Pick a position from 0 to 1 and get the matching color of a Cividis-style ramp made for color vision deficiency: position 0 returns #00204c.
A
Runs in your browser
🖼️ ImagesFree
ΔEITP (BT.2124) calculator
Compare two sRGB hex colors with the ΔEITP metric from BT.2124: their distance in ICtCp space, multiplied by 720, which is 0 when they are identical, as with…
A
Runs in your browser
🖼️ ImagesFree
OKLab ΔE (ΔEOK) calculator
Paste two sRGB hex codes and get their ΔEOK, the straight-line distance between them in OKLab: #000000 against itself gives 0, and the further apart the colors…
A
Runs in your browser
🖼️ ImagesFree
Paul Tol discrete palettes
Pick a Paul Tol family and a count: bright with 3 colors returns #4477AA, #EE6677 and #228833. The colors come from fixed tables, so the same request always…
A
Runs in your browser
🖼️ ImagesFree
Google Turbo colormap sample
Turn a number between 0 and 1 into a Turbo color: position 0 gives red 35, green 23 and blue 27, the dark #23171b at the start of the scale.
A
Runs in your browser
🖼️ ImagesFree
Yellowness index (ASTM)
Get one number for yellowing: X 80, Y 85 and Z 90 under illuminant C give a yellowness index of 8.0282 by ASTM E313.
A
Runs in your browser
📅 Dates & timeFree
Remembrance Sunday date
In 2026 Remembrance Sunday falls on 8 November, the Sunday nearest to Armistice Day on 11 November.
A
Runs in your browser
💰 Finance & moneyFree
Debt yield calculator
A property with 50,000 of net operating income and a 500,000 loan has a debt yield of 10%: its income equals a tenth of the amount borrowed.
A
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💰 Finance & moneyFree
50% rule operating expense estimate
The 50% rule says about half of a rental's gross rent goes to operating expenses, mortgage excluded: 2,000 a month in rent means roughly 1,000 in expenses and…
A
Runs in your browser
💰 Finance & moneyFree
Gross rent multiplier (GRM)
Divide a property's price by its annual gross rent to get its gross rent multiplier: 300,000 for a property that rents for 24,000 a year gives a GRM of 12.5.
A
Runs in your browser
💰 Finance & moneyFree
Rule of 72 doubling time
Divide 72 by the annual rate to see roughly how long money takes to double: at 6% it is about 12 years. Or start from the years and get the rate you would need.
A
Runs in your browser
🧭 Travel & geographyFree
Andoyer–Lambert distance
Along the equator, from longitude 0° to longitude 1°, the Andoyer–Lambert distance on the WGS84 ellipsoid is 111319.491 m.
A
Runs in your browser
🧭 Travel & geographyFree
Hammer projection calculator
Project a latitude and longitude onto the Hammer equal-area world map, or turn x and y back into coordinates: the point at latitude 0 and longitude 0 lands at…
A
Runs in your browser
🧭 Travel & geographyFree
Horizontal sextant angle distance
Turn a horizontal sextant angle between two charted marks into distances: with a baseline of 100 between A and B and an angle of 60°, the circle through both…
A
Runs in your browser
🧭 Travel & geographyFree
Polaris latitude calculator
An observed Polaris altitude of 40° with corrections of 0.5, -0.1 and 0.05 gives a latitude of 40.45°.
A
Runs in your browser
➗ MathFree
Basic proportionality (Thales)
With AD of 3, DB of 6, AE of 2 and EC of 4, both ratios are 0.5, so Thales' proportion holds. Enter the four segments cut by a parallel line and check the…
A
Runs in your browser
➗ MathFree
Isosceles trapezoid calculator
Enter the two bases and the height of an isosceles trapezoid and get the whole figure: bases of 10 and 6 with a height of 4 give an area of 32, legs of…
A
Runs in your browser
➗ MathFree
German number to words
Type 21 and get einundzwanzig: the converter writes whole numbers from 0 to 999999 as German words, with the unit before the ten and hundert and tausend joined…
A
Runs in your browser
➗ MathFree
Italian number to words
21 becomes ventuno, not ventiuno: the converter spells whole numbers from 0 to 999999 in Italian, dropping the vowels Italian drops and choosing mille or mila…
A
Runs in your browser
➗ MathFree
Portuguese number to words
21 is written vinte e um: the converter spells whole numbers from 0 to 999999 in Portuguese, placing the linking e where it belongs and choosing correctly…
A
Runs in your browser
➗ MathFree
Oblique cone volume calculator
A cone with radius 3 and perpendicular height 5 holds about 47.12389 cubic units, tilted or not. Enter the base radius and the height to get the volume and the…
A
Runs in your browser
➗ MathFree
German ordinal words
1 becomes erste and 2 becomes zweite: the converter gives the German ordinal word for any whole number from 1 to 100, with the special forms of the first twenty…
A
Runs in your browser
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1
Get your key
Create an account with your email and add balance when you need it. No subscription, no sales call.
2
Call the endpoint
One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.
3
Collect the result
Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.
Pay only for what you use
No subscription. Free tools run in your browser; paid tasks draw from your balance, which never expires.
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On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.
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Per task
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The full API — 7800+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.
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