ForHosting KIT
Free tools that work
right in your browser.
Calculators, converters, PDF, text, images and much more — each with its own page. Type your data and get the result right here, with no sign-up and without your data leaving your device. Need them in your own app? The same tools are available by API.
REST APILive
EmailLive
Webkit.forhosting.comLive
TelegramLive
iOS & AndroidBuilding
WhatsAppComing
7830tools
7432free in your browser
8languages
6channels
Find your tool
Search in your own words or filter by category.
➗ MathFree
Extravagant number checker
Four is extravagant because its factorization, 2², takes two digits while 4 takes only one. Enter any whole number from 2 up and see both digit counts side by…
A
Runs in your browser
➗ MathFree
Golomb sequence calculator
Get any term of Golomb’s sequence: the 10th term is 5 and the 20th is 8. The sequence 1, 2, 2, 3, 3, 4, 4, 4… lists each value as many times as its own term…
S
Runs in your browser
➗ MathFree
Gray code decoder
Paste a Gray code reading and get the number it stands for: 0111 decodes to binary 0101, which is 5.
K
Runs in your browser
➗ MathFree
Palindrome bases finder
See every base in which a number reads the same both ways: up to base 16, 10 is a palindrome in bases 3, 4 and 9, written 101, 22 and 11, and in every base from…
S
Runs in your browser
➗ MathFree
Super-prime checker
11 is the fifth prime and 5 is prime, so 11 is a super-prime; 7 is the fourth prime, and 4 is not.
P
Runs in your browser
➗ MathFree
Ulam sequence calculator
The first ten Ulam numbers are 1, 2, 3, 4, 6, 8, 11, 13, 16 and 18, so the tenth is 18. Enter how many terms you need to get the ordered list and its last…
A
Runs in your browser
➗ MathFree
Line intercept form calculator
Enter where the line crosses each axis and get every form of its equation: intercepts 6 and 3 give the slope −0.5, x/6 + y/3 = 1 and the standard form x + 2y =…
K
Runs in your browser
➗ MathFree
Discriminant and root type calculator
Know how many real solutions a quadratic has before solving it: for x² − 5x + 6 the discriminant is 25 − 24 = 1, which is positive, so there are two distinct…
S
Runs in your browser
➗ MathFree
Quadratic y-intercept calculator
Get the y-intercept of a parabola instantly: for f(x) = 2x² − 3x + 5, putting in zero for x leaves the constant, so the curve crosses the y-axis at (0, 5).
B
Runs in your browser
➗ MathFree
Standard form of a line calculator
2x + 4y = 6 and x + 2y = 3 are the same line; standard form keeps only the second, with whole-number coefficients, no common factor and a positive leading term.
S
Runs in your browser
➗ MathFree
Height of a square pyramid
A square pyramid with a base side of 6 and a volume of 144 stands 12 tall: enter those two values and get the perpendicular height in the matching unit.
H
Runs in your browser
➗ MathFree
Height of a cone calculator
A cone holding about 37.7 with a base radius of 3 stands 4 tall: enter the volume and the radius to get the perpendicular height of a right circular cone, the…
G
Runs in your browser
➗ MathFree
Legendre formula calculator
The prime 5 appears 24 times in the factorial of 100: 100 divided by 5 gives 20, 20 divided by 5 gives 4, and 20 plus 4 makes 24.
K
Runs in your browser
➗ MathFree
Reduced binary quadratic forms
Lists the reduced primitive positive-definite forms ax² + bxy + cy² for a negative discriminant; −23 gives three forms, [1, 1, 6], [2, −1, 3] and [2, 1, 3], so…
B
Runs in your browser
➗ MathFree
Tetranacci number calculator
Starting from 0, 0, 0 and 1 and adding the last four terms each time, position 10 holds 56. Enter a position to get its exact tetranacci number, with every…
P
Runs in your browser
➗ MathFree
Absolute Value Greater-Than Inequality Solver
|2x − 6| > 4 holds when x < 1 or x > 5, written (−∞, 1) ∪ (5, ∞): the values lie outside a central range.
K
Runs in your browser
➗ MathFree
Augmented matrix solver
Type the augmented matrix [A|b] and learn whether the system has one solution, infinitely many or none; the classic three-equation example returns the solution…
S
Runs in your browser
➗ MathFree
Cubic discriminant calculator
x³ − 6x² + 11x − 6 has discriminant 4, so it has three distinct real roots: enter the four coefficients and get the discriminant, its sign and how many…
K
Runs in your browser
➗ MathFree
Descartes rule of signs calculator
x² − 3x + 2 has 2 sign changes, so it has 2 or 0 positive real roots and no negative ones: enter the coefficients from the highest power down and get every…
S
Runs in your browser
➗ MathFree
Direct variation calculator
Give one known pair and get the constant of variation with its equation: when x is 4 and y is 12, k is 3, so y equals 3x and an x of 7 gives a y of 21.
A
Runs in your browser
➗ MathFree
Horner method calculator
Evaluate 2x³ − 6x² + 2x − 1 at x equals 3 and get 5, with every intermediate step (2, 0, 2, 5) shown so you can compare it with a handwritten Horner table.
B
Runs in your browser
➗ MathFree
Quadratic maximum-minimum calculator
Find the turning point of a parabola in one step: f(x) = x² − 6x + 5 has its minimum value −4 at x equal to 3, because a is positive and the graph opens upward.
P
Runs in your browser
➗ MathFree
Quartic equation from roots calculator
Give four roots and get the quartic back: roots 1, 2, 3 and 4 expand to x^4 - 10x^3 + 35x^2 - 50x + 24 = 0.
B
Runs in your browser
➗ MathFree
Height of a cylinder calculator
A cylinder holding about 62.83 with a base radius of 2 is 5 tall: enter the volume and the radius to get the height of a right circular cylinder, worked out as…
G
Runs in your browser
➗ MathFree
Heptagon calculator
A side of 5 is all a regular heptagon needs: it gives a perimeter of 35, an area of about 90.847811 and interior angles of 128.571429° each.
H
Runs in your browser
➗ MathFree
Compound inequality solver
−2x + 4 < 8 and 3x − 1 ≤ 11 together give (−2, 4]: enter both inequalities, say whether both must hold or either one is enough, and get the combined interval…
A
Runs in your browser
➗ MathFree
Factor trinomial calculator
Enter three whole-number coefficients and get the trinomial factored exactly: 6x² + 5x + 1 becomes (2x + 1)(3x + 1).
K
Runs in your browser
➗ MathFree
Vertical shift of a function calculator
Add a constant to a function and see the graph move: shifting x² − 4x + 3 by 5 gives g(x) = (x² − 4x + 3) + 5, five units up, and the point (2, −1) lands at (2…
B
Runs in your browser
➗ MathFree
Polynomial LCM calculator
Get the smallest polynomial both inputs divide: x² − 3x + 2 and x² − 1 share x − 1, so their least common multiple is x³ − 2x² − x + 2, of degree 3.
B
Runs in your browser
➗ MathFree
Simplify rational expression calculator
(x^2 - 1)/(x - 1) simplifies to x + 1, yet the value 1 stays excluded because it made the original denominator zero.
S
Runs in your browser
➗ MathFree
Rational function x-intercepts calculator
The graph of (x - 1)/(x^2 - 4) crosses the x-axis only at (1, 0). The calculator finds every real zero of the numerator and drops those that also zero the…
S
Runs in your browser
➗ MathFree
System of linear inequalities calculator
x + y ≤ 6 with x ≥ 0 and y ≥ 0 shades a triangle with corners (0, 0), (6, 0) and (0, 6). The calculator lists every boundary line and corner point and says…
P
Runs in your browser
➗ MathFree
Hexagonal pyramid surface area
A hexagonal pyramid with a base side of 2 and a slant height of 3 has a total surface of about 28.392: 18 for the six triangular faces, the rest for the…
H
Runs in your browser
➗ MathFree
Hilbert's hotel paradox
With three guests in rooms 1 to 3 and two new arrivals, everyone moves up two rooms and rooms 1 and 2 open up.
H
Runs in your browser
➗ MathFree
Complex Reciprocal Calculator
The reciprocal of 3 + 4i is 0.12 − 0.16i, because its squared modulus is 25: enter the real and imaginary parts and get 1/z in rectangular form, ready for…
B
Runs in your browser
➗ MathFree
Complex to polar form calculator
−3 + 4i has modulus 5 and argument 126.869897645844°: enter the real and imaginary parts, pick radians or degrees, and get r, θ and the trigonometric form ready…
K
Runs in your browser
➗ MathFree
Exponential growth calculator
See where steady percentage growth leads: 1000 growing 5% per period for 10 periods reaches 1628.89462678, with the factor of 1.05 per period and the…
B
Runs in your browser
➗ MathFree
Exponential equation same-base solver
Solve equations like 8^(x+1) = 4^(2x−1) without logarithms: 8 becomes 2³, 4 becomes 2², the exponents are set equal and the answer is 5.
S
Runs in your browser
➗ MathFree
Function zeros calculator
Enter up to four coefficients and get the points where the graph meets the x-axis: x² − 5x + 6 has the real zeros 2 and 3.
A
Runs in your browser
➗ MathFree
Hyperbolic functions calculator
At 1.5 you get a hyperbolic sine of 2.12927945509, a cosine of 2.35240961524 and a tangent of 0.905148253645, all three from the same number.
G
Runs in your browser
➗ MathFree
Imaginary unit powers
i to the 7th is -i, and i to the 437th is simply i: the powers of i repeat every four steps, so any whole exponent, huge or negative, lands on 1, i, -1 or -i.
H
Runs in your browser
➗ MathFree
Improper fraction to mixed number converter
Eleven fourths is 2 and 3/4. Enter the numerator and the denominator to get the whole part and the leftover fraction, already reduced, so 10/4 comes out as 2…
G
Runs in your browser
➗ MathFree
Inscribed angle calculator
An arc of 120 degrees gives an inscribed angle of 60, exactly half, and you also get it in radians, 1.047197551197.
H
Runs in your browser
➗ MathFree
Common Difference Calculator
In 4, 9, 14, 19, 24 every step is 5, so the common difference is 5 and the sequence is arithmetic.
B
Runs in your browser
➗ MathFree
Arithmetic mean calculator
The average of 2, 4, 6 and 8 is 5: their sum is 20 and there are 4 numbers. Enter any list of numbers to get the arithmetic mean together with the sum and…
A
Runs in your browser
➗ MathFree
Distance between complex numbers calculator
3 + 4i is 5 units from the origin, and 1 + 2i is 5 units from 4 + 6i: enter two complex numbers and get the distance between them, the squared distance and…
S
Runs in your browser
➗ MathFree
Complex number from modulus and argument calculator
A modulus of 5 at an angle of 53.130102354156° gives 3 + 4i: enter the distance from the origin and the direction, in radians or degrees, and get the real and…
K
Runs in your browser
➗ MathFree
Exponential function from two points
Give two points and get the exponential function through them: (0, 3) and (1, 6) give a starting value of 3 and a base of 2, so the model is 3 · 2ˣ and it…
A
Runs in your browser
➗ MathFree
Matrix scalar multiplication calculator
Multiply a 2 × 3 matrix by −2 and every entry scales at once: 1 becomes −2, 4 becomes −8 and 8 becomes −16, while the shape stays 2 × 3. Free in your browser.
B
Runs in your browser
➗ MathFree
Sequence Term from Explicit Formula Calculator
Get any term of a sequence straight from its rule: 3n^2 - 2n + 5 at index 4 gives 45, with no table of earlier terms to build.
K
Runs in your browser
➗ MathFree
Sum of first n even numbers calculator
The first 5 even numbers, 2 + 4 + 6 + 8 + 10, add up to 30, because the sum of the first n even numbers is n(n + 1).
S
Runs in your browser
➗ MathFree
Integer checker
42 is a whole number, 3.0 counts too because its value is three, and 3.0000001 does not. Type any value and get a strict yes or no, while nonsense like abc is…
G
Runs in your browser
➗ MathFree
Integration by completing the square
The integral of 1 over x² + 2x + 5 is 0.5 times the arctangent of (2x + 2)/4, plus C. Enter the three coefficients of the quadratic and see each step: the…
H
Runs in your browser
➗ MathFree
Binomial expansion specific term calculator
The third term of (2x − 3y)^5 is 720x^3y^2: enter the power, the position and the two multipliers and get that single term without writing out the whole…
B
Runs in your browser
➗ MathFree
Identity matrix generator
Choose the order n and get the exact identity matrix: for order 3, three ones on the diagonal and six zeros elsewhere.
A
Runs in your browser
➗ MathFree
2×2 matrix inverse calculator
For rows 4, 7 and 2, 6, the determinant is 10, the adjugate has rows 6, −7 and −2, 4, and dividing by 10 gives the inverse 0.6, −0.7, −0.2, 0.4.
S
Runs in your browser
➗ MathFree
Row echelon form calculator
Enter rows 1, 2, 1; 2, 1, −1; −1, 1, 2 and get a staircase with two pivots and a final row of zeros, so the rank is 2.
K
Runs in your browser
➗ MathFree
Interior and exterior triangle angles calculator
Two angles of 60° and 80° leave 40° for the third, and the exterior angles come out as 120°, 100° and 140°.
G
Runs in your browser
➗ MathFree
Interval notation converter
A lower bound of -2 that is included and an upper bound of 5 that is not give [-2, 5): every number from minus two up to, but not including, five.
H
Runs in your browser
➗ MathFree
Absolute value equation two solutions calculator
|2x − 3| = 5 splits into 2x − 3 = 5, which gives 4, and 2x − 3 = −5, which gives −1. Enter your three numbers to see both case equations and their roots in…
S
Runs in your browser
No capabilities match your search.
How it works
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.
Free tools
$0.00
On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.
Pay-as-you-go
Per task
$0.002+
The full API — 7800+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.
Balance
$10.00+
Top up your balance and spend it across web, API and the app. It never expires.