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✍️ Text & AIFree
Average syllables per word calculator
Two sentences with 10 words and 25 estimated syllables average 2.5 syllables per word, a sign of dense, technical vocabulary.
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✍️ Text & AIFree
Count unique words
“The quick brown fox jumps over the lazy dog. The fox is quick!” has 13 words but only 9 unique ones, because The and the count as one.
A
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✍️ Text & AIFree
Find longest word
Find the longest word in a passage and how many letters it has: in a sentence about English puzzles, supercalifragilisticexpialidocious wins with 34 letters.
S
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✍️ Text & AIFree
Convert to COBOL-CASE
customer account record becomes CUSTOMER-ACCOUNT-RECORD, and customerAccount becomes CUSTOMER-ACCOUNT: every word is raised to capitals and joined to the next…
B
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✍️ Text & AIFree
Coleman-Liau index calculator
Three short sentences about a cat on a mat score −2.975, about grade −3, early elementary reading.
A
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✍️ Text & AIFree
Get first word from text
From "Hello, world — this is a preview." you get Hello, 5 characters long, and the rest of the line separately.
S
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✍️ Text & AIFree
Normalize whitespace
Squeeze messy text into one clean line: a 36-character greeting full of tabs, double spaces and line breaks becomes Hello, world! How are you? in 26 characters.
A
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✍️ Text & AIFree
Count Stop Words in Text for SEO Analysis
In «The quick brown fox jumps over the lazy dog and into the garden», 6 of 13 words are stop words, 46.15% of the text.
B
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✍️ Text & AIFree
Normalize Hyphens and Dashes
Turn a mix of look-alike dashes into one consistent character: in a sentence with a 10–15 page range, an em dash, a minus sign and a full-width dash, 5…
B
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✍️ Text & AIFree
Remove non-ASCII characters
Café becomes Cafe, Straße becomes Strasse and São Paulo becomes Sao Paulo, while emoji, CJK characters, currency signs and curly quotes are deleted.
S
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✍️ Text & AIFree
Remove soft hyphens
Strip the 3 invisible break marks hidden in the sample sentence copied from a PDF, and hyphenation, international and cooperation become whole words again.
P
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✍️ Text & AIFree
Sort lines numerically
item 20, item 3, item 100 and item 11 come back as item 3, item 11, item 20, item 100, ordered by value instead of by characters, which would put 100 before 20.
B
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✍️ Text & AIFree
Trim blank lines top and bottom
Paste a block with two empty lines above and two below, and those four go while the three lines in between stay untouched, gaps and indents included.
A
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✍️ Text & AIFree
Number lines with a custom start and step
Start at 10 with a step of 5 and four lines become 10, 15, 20 and 25. Continue an excerpt at 241, leave gaps for later inserts or count down, while every line…
B
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✍️ Text & AIFree
Join lines with a separator
Three lines with apple, banana and cherry become apple, banana, cherry on a single line. Blank rows are skipped by default, spaces around each line are trimmed…
S
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✍️ Text & AIFree
Pad a string on the right to a fixed length
Extend text on the right to an exact length: Item padded to 10 with dots becomes Item......, with 6 dots added.
B
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✍️ Text & AIFree
Sort words by length
Paste a passage and get its words lined up by letter count: «I am a poet of moonlight» becomes I, a, am, of, poet, moonlight.
S
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✍️ Text & AIFree
Truncate in the middle
Fit a 62-character path into 36 and keep both ends: /Users/alex/Docum...engines/parse.js still shows the root folder and the file name.
A
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✍️ Text & AIFree
Wrap each line with text
Paste alpha, beta and gamma on three lines and get "alpha", "beta" and "gamma", each wrapped in straight double quotes by default.
P
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✍️ Text & AIFree
Extract IP addresses from text
Paste a log line with 192.168.1.10, 10.0.0.25, 8.8.8.8 and 10.0.0.25 again, and all 4 come back in order, while 999.1.2.3 is skipped because no part may exceed…
B
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✍️ Text & AIFree
Extract numbers from text
A sentence mentioning 12.5%, 1,234,567.89, 3 plants, 4200 units, a -1.5 margin and 2e3 spares gives back exactly those 6 numbers, in reading order and with…
A
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✍️ Text & AIFree
Extract words ending with a suffix
Ask for words ending in ing and "The running fox is jumping, hopping, and singing while the dog is sleeping" gives running, jumping, hopping, singing and…
P
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✍️ Text & AIFree
Jaro similarity calculator for two strings
MARTHA and MARHTA score 0.9444444444444445, close to 1 although two letters swapped places. Jaro rewards shared characters in a compatible order instead of…
B
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✍️ Text & AIFree
Unique lines preserving order
Paste alpha, beta, alpha, gamma, beta, one per line, and get alpha, beta, gamma: each line stays where it first appeared and the 2 later copies are dropped.
S
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✍️ Text & AIFree
Convert em units to pixels
At a 16 px parent font size, 1.5em is 24 px, and at 20 px the same value becomes 30 px. Enter the em value and the parent size to see the real pixel length of a…
B
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✍️ Text & AIFree
Expand typographic ligatures
Pasted text like "The office file is flexible" comes back with plain office, file and flexible, plus a count of what changed.
B
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✍️ Text & AIFree
Find position of substring
In "The kit parses logs: ERROR at line 12, then INFO, then ERROR again." the first ERROR sits at index 21, line 1, column 22, and ends before 26.
A
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✍️ Text & AIFree
Words per line calculator
A 66-character column with five-letter average words holds 11 whole words, using 65 characters and leaving 1 spare.
S
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✍️ Text & AIFree
Transpose CSV rows and columns
name,age,city over Ada,36,London and Bob,41,Paris flips into name,Ada,Bob, then age,36,41, then city,London,Paris: every row becomes a column.
S
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✍️ Text & AIFree
Convert Lines to a Markdown Checklist
Paste one task per line and get a ready Markdown checklist: Review the proposal, Assign an owner and Set a due date become 3 unchecked boxes.
B
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✍️ Text & AIFree
Pad to monospace width
Line up columns that mix Latin and East Asian writing: 東京 takes 4 columns, so padding it to 8 adds just 4 spaces, not 6.
A
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🧭 Travel & geographyFree
Multi-day drive days calculator
1,800 miles at no more than 400 a day takes 5 driving days and 4 hotel nights, with 200 miles left for the last morning.
A
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🧭 Travel & geographyFree
Two-leg trip time calculator
Drive 180 km at 90 km/h, then 30 km at 30 km/h, and the trip takes 3 hours with a combined average of 70 km/h, not the 60 you get by averaging the speeds.
S
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🧭 Travel & geographyFree
Annual fuel cost calculator
Driving 12,000 miles a year at 28 mpg with fuel at 3.50 a gallon costs 1,500 a year, 125 a month. Enter your yearly mileage, fuel economy and pump price to see…
S
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🧭 Travel & geographyFree
Car depreciation by year calculator
At 15% a year, a car keeps 85% of its price after the first year and 44.37% after five, because each year's loss is taken from what is left.
A
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🧭 Travel & geographyFree
EV cost per mile calculator
280 Wh per mile is 0.28 kWh per mile, or 28 kWh per 100 miles: multiply by your electricity price and you get the energy cost of every mile and every kilometre…
S
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🧭 Travel & geographyFree
Flight fuel reserve calculator
Burning 12 gallons an hour on a 2.5-hour trip, with a 0.5-hour alternate, a 45-minute reserve and 5 % contingency, you need 46.5 gallons on board.
A
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🧭 Travel & geographyFree
Gear ratio speed spread calculator
At 3000 rpm, a six-speed box with a 3.5 first gear, a 0.7 top gear, a 3.73 final drive and a 650 mm tire shows its speed in every gear and an overall spread of…
A
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🧭 Travel & geographyFree
Aviation oxygen duration calculator
A 600-litre bottle at 1,500 of 1,800 psi holds 500 usable litres, enough for 125 minutes when two people each breathe 2 litres per minute.
A
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🧭 Travel & geographyFree
Takeoff ground-roll calculator
Start from a 1,000 ft sea-level ground roll charted at a 2,400 lb reference weight and correct it for density altitude, actual weight, headwind and runway…
S
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🧭 Travel & geographyFree
Tide time for depth calculator
With high water at 5 and low water at 1.4, a target of 3.2 is reached 3 hours after high water on the falling tide, exactly half the 3.6 range.
S
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🧭 Travel & geographyFree
Wind pressure on sail calculator
20 knots on 30 m² of sail, square to the wind, push with about 1945 N, a little under 200 kgf. Add the height of the centre of effort and you also get the…
A
Runs in your browser
🧭 Travel & geographyFree
Time difference between cities calculator
At 15:00 in New York (UTC−5) it is 05:00 the next day in Tokyo (UTC+9), a 14-hour difference. Type both cities, their UTC offsets and the local time to plan a…
A
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🧭 Travel & geographyFree
Trip nights and days calculator
Check in on Friday 12 July 2024 and check out on Monday 15 July and you pay for 3 nights while the trip spans 4 calendar days.
S
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🧭 Travel & geographyFree
Aerodynamic drag power calculator
At 100 km/h, a car with 2.2 m² of frontal area and a drag coefficient of 0.28 needs about 8 kW just to push the air aside; the calculator also shows the drag…
A
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🧭 Travel & geographyFree
Hydroplaning speed calculator
At 35 psi of cold tire pressure, the classic NASA estimate puts the start of hydroplaning at about 61.2 mph, or 98.6 km/h.
S
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🧭 Travel & geographyFree
Cabin altitude from pressure calculator
At 35,000 feet with 8 psi of cabin differential, the cabin sits between 6,500 and 7,000 feet, inside the usual 8,000-foot planning limit.
A
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🧭 Travel & geographyFree
Metric to inch tire size converter
A 265/75R16 tire stands 31.65 inches tall and 10.43 inches wide on a 16-inch rim, so its flotation code is 31.65x10.43R16.
S
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🧭 Travel & geographyFree
Cross-currency rate calculator
With 0.92 euros and 150 yen to the dollar, one euro buys about 163 yen: the calculator divides one quote by the other and also gives the inverse, so a trip…
A
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🧭 Travel & geographyFree
Wind-shear gradient calculator
10 knots at 50 ft and 35 knots at 2000 ft mean a shear of about 12.8 knots per 1000 ft, classed as strong.
S
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🔬 ScienceFree
Codominance cross ratio calculator
Two roan RW cattle produce calves in a 1:2:1 ratio, 25% red, 50% roan and 25% white, because a codominant heterozygote shows both alleles.
A
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🧭 Travel & geographyFree
Itinerary time budget calculator
A 14-hour day with 2 hours of transit and 2 of rest leaves 10 hours for activities, so a museum, market, park and dinner walk totalling 7.5 hours fit with 2.5…
S
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🔬 ScienceFree
Chi-square degrees of freedom genetics
A dihybrid 9:3:3:1 table has four phenotype classes and three degrees of freedom. Enter your class count and any estimated parameters to get the right number…
A
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🔬 ScienceFree
Coefficient of relationship calculator
Full siblings share two pedigree paths of two links each, so their coefficient of relationship is 0.5, or 50%.
S
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🔬 ScienceFree
Mutation-selection equilibrium calculator
See how common a hidden recessive allele can remain: with a mutation rate of 0.000001 and a selection coefficient of 0.01, the allele settles at 0.01, carriers…
S
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🔬 ScienceFree
mRNA to protein length calculator
Know how long the protein will be from the message alone: a 300-nucleotide coding sequence holds 100 codons and gives a protein of 99 amino acids, because the…
A
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🔬 ScienceFree
Bacterial exponential growth calculator
100 bacteria with a 20-minute generation time become 800 after 60 minutes: three doublings, an eightfold increase.
S
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🔬 ScienceFree
Ligation insert:vector ratio calculator
Set up a ligation by molecules, not by mass: with 50 ng of a 3000 bp vector, a 500 bp insert and a 3:1 ratio, you add 25 ng of insert.
A
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🔬 ScienceFree
PCR product yield copies calculator
See how far a PCR can go in theory: 100 starting copies after 30 cycles at 100% efficiency become 107,374,182,400 amplicon copies, about 1.073742 × 10¹¹.
S
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🔬 ScienceFree
Biomass yield coefficient calculator
Find how much biomass each gram of substrate made: biomass rising from 0.5 to 4.5 while substrate falls from 20 to 2 gives 4 grams of cells from 18 grams…
S
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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.
Pay-as-you-go
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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