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.
⚙️ Developer UtilitiesFree
CIDR first and last usable host calculator
192.168.1.0/24 gives usable hosts 192.168.1.1 through 192.168.1.254, 254 addresses once the network and broadcast are set aside.
P
Runs in your browser
⚙️ Developer UtilitiesFree
Subnet prefix cheatsheet
A /24 is mask 255.255.255.0, wildcard 0.0.0.255, 256 addresses and 254 usable hosts: pick a range of prefix lengths and get one row per prefix, ready for exams…
S
Runs in your browser
⚙️ Developer UtilitiesFree
TCP flags decoder
0x12, or 18, is SYN plus ACK, not a lone SYN: type a flags byte in decimal, hex or binary to see every control bit by name, or list names such as SYN and ACK to…
P
Runs in your browser
⚙️ Developer UtilitiesFree
Expected hash collisions calculator
Hash 100 keys into 128 buckets and, on average, more than half the keys end up sharing a bucket, at a load factor of 0.78125.
S
Runs in your browser
⚙️ Developer UtilitiesFree
Binary heap parent index calculator
Enter a node's index and pick the numbering: in a zero-based heap, index 5 has its parent at 2, because the floor of 4 over 2 is 2.
P
Runs in your browser
⚙️ Developer UtilitiesFree
Quadtree capacity calculator
See how large a fully populated quadtree gets at a given depth, such as 8 cells per side, 64 leaves, 21 internal nodes and 85 nodes in total at depth 3.
S
Runs in your browser
✍️ Text & AIFree
English word singularizer
Turn an English plural into its singular: cities becomes city, children becomes child and sheep stays sheep.
P
Runs in your browser
⚙️ Developer UtilitiesFree
Identifier naming case detector
Type a name from your code and see which convention it follows: getUserName is camelCase and splits into get, user and name.
S
Runs in your browser
⚙️ Developer UtilitiesFree
SemVer version parser
Split a version such as 1.2.3-alpha.1+build.7 into major 1, minor 2, patch 3, prerelease alpha.1 and build build.7, checked strictly against SemVer 2.0.0.
P
Runs in your browser
🕸️ Web Scraping & MonitoringFree
Data URI size calculator
Know how long a data URI will be before you encode anything: a 1024-byte PNG becomes 1390 characters, which still fits the default 2048-character budget, so…
P
Runs in your browser
⚙️ Developer UtilitiesFree
UUID to integer converter
550e8400-e29b-41d4-a716-446655440000 is the 128-bit integer 113059749145936325402354257176981405696: paste a UUID, a decimal integer or a hex string and get all…
S
Runs in your browser
⚙️ Developer UtilitiesFree
Hash table bucket count calculator
Plan 1,000 keys at a load factor of 0.75 and you need at least 1,334 buckets, which rounds up to 2,048 as a power of two.
S
Runs in your browser
💰 Finance & moneyFree
Future value annuity due calculator
Paying 1,000 at the start of each year for 10 years at 5% grows to 13,206.79, which is 628.89 more than paying at the end.
P
Runs in your browser
💰 Finance & moneyFree
Loan monthly payment calculator
Find the fixed monthly installment for any loan: 25,000 at 6.5% over 60 months costs 489.15 a month and 4,349.22 in total interest.
S
Runs in your browser
💰 Finance & moneyFree
Two loan comparison calculator
Put two loan offers side by side: 250,000 at 6.5% over 30 years costs 1,580.17 a month, while 5.9% over 15 years costs 2,096.16 but saves 191,552.52 in…
P
Runs in your browser
💰 Finance & moneyFree
Mortgage total cost calculator
A 300,000 mortgage at 6.5% over 30 years costs 682,633.47 in total: 382,633.47 of it is interest, 56.05% of everything you pay.
S
Runs in your browser
💰 Finance & moneyFree
Dividend yield calculator
A dividend of 2.4 a year on a share priced at 80 is a 3% dividend yield; if the price halves and the payout stays, the yield doubles to 6%.
S
Runs in your browser
💰 Finance & moneyFree
FIRE target portfolio calculator
Turn yearly spending into the portfolio your FIRE plan has to reach: 40,000 at the classic 4% rule means 1,000,000.
P
Runs in your browser
💰 Finance & moneyFree
Bond current yield calculator
A 60 coupon on a bond quoted at 950 is a current yield of 6.3158%; at a 1,000 quote it would be 6%.
S
Runs in your browser
💰 Finance & moneyFree
IRA growth calculator
Project what your IRA could be worth: 10,000 today plus 6,500 a year for 30 years at 7% grows to 690,117.66, of which 205,000 is money you put in.
P
Runs in your browser
💰 Finance & moneyFree
Short vs long-term capital gains calculator
On a 20,000 gain, a 32% short-term rate means 6,400 of tax and a 15% long-term rate means 3,000, so waiting for the long-term rate saves 3,400.
P
Runs in your browser
💰 Finance & moneyFree
Add sales tax calculator
At 8.25%, a pre-tax price of 100 carries 8.25 of tax and a gross of 108.25, and any known sales tax rate is added the same way.
S
Runs in your browser
💰 Finance & moneyFree
Contribution margin calculator
A product sold at 50 with a variable cost of 30 leaves a contribution margin of 20 per unit, a 40% ratio.
S
Runs in your browser
💰 Finance & moneyFree
Net present value calculator
Invest 10,000 today, receive 3,000, 4,200 and 6,800 over three periods, discount at 10%, and the NPV is 1,307.29: accept.
P
Runs in your browser
💰 Finance & moneyFree
Credit utilization ratio calculator
One card with 1,200 owed on a 4,000 limit and another with 800 on 2,000 add up to 33.33% credit utilization, just above the 30% guideline.
P
Runs in your browser
💰 Finance & moneyFree
Return on assets calculator
See how hard a company's assets work: 50,000 of net income on 500,000 of total assets is an ROA of 0.1, or 10%.
A
Runs in your browser
💰 Finance & moneyFree
Working capital calculator
Current assets of 150,000 against current liabilities of 80,000 leave 70,000 of net working capital and a current ratio of 1.875.
S
Runs in your browser
💰 Finance & moneyFree
Impermanent loss calculator
If one token's price doubles against the other, a 50/50 pool position ends about 5.72% behind simply holding the tokens; a fourfold move costs 20%.
P
Runs in your browser
💰 Finance & moneyFree
Housing cost ratio calculator
See what share of gross income goes to housing: 1,800 of housing costs on 6,000 of monthly income is 30%, right at the common 30% rule.
S
Runs in your browser
💰 Finance & moneyFree
Cheaper package unit price calculator
Pack A costs 3.49 for 16 ounces and pack B 5.99 for 32: per ounce that is 0.218125 against 0.1871875, so B is the better buy.
A
Runs in your browser
🏠 Home, food & hobbiesFree
Diffraction-limited aperture calculator
With 4.3 µm pixels and 550 nm light, diffraction starts to soften detail past f/6.3: enter pixel pitch and wavelength to find the smallest aperture worth using…
S
Runs in your browser
🏠 Home, food & hobbiesFree
Graduated ND filter transition calculator
A sky metering EV 15 over land at EV 12 means 3 stops of contrast and a 0.9 hard GND: enter both readings and the horizon to get the filter strength and where…
P
Runs in your browser
🏠 Home, food & hobbiesFree
Vertical angle of view calculator
A 50 mm lens on a 24 mm tall full-frame sensor sees about 27 degrees from top to bottom: enter the focal length and sensor height to check whether a facade or a…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Guide number from aperture and distance
A correct exposure at f/8 with the flash 4.5 m away means a guide number of 36 at ISO 100: enter the aperture, distance and ISO of a shot that worked and get…
A
Runs in your browser
🏠 Home, food & hobbiesFree
ISO after stops change calculator
Raising ISO 100 by 2 stops multiplies sensitivity by 4 and lands on ISO 400: enter the starting ISO and a signed change in stops, whole or in thirds, to get the…
S
Runs in your browser
🏠 Home, food & hobbiesFree
Number of bars in a song calculator
A three-minute song at 120 BPM in 4/4 holds exactly 90 bars, each lasting 2 seconds. Enter the length, tempo and meter of any track to plan phrases, radio edits…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Dotted note delay time calculator
At 120 BPM a dotted-eighth delay is 375 ms, with echoes landing at 750, 1125 and 1500 ms, between the straight beats.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Interval in cents from frequency ratio calculator
A just fifth of 1.5 measures almost 2 cents more than the 700 cents of an equal-tempered fifth: enter any positive frequency ratio and see its size in cents…
S
Runs in your browser
🏠 Home, food & hobbiesFree
Knitting rows for length calculator
At 7.5 rows per inch, a 24-inch scarf takes 180 rows. Enter your row gauge, or the rows counted over 10 cm, and the finished length to get a whole-row count for…
P
Runs in your browser
🏠 Home, food & hobbiesFree
Knitting yarn yardage estimator
Multiply your stitch total by the yarn each stitch uses: 28000 stitches at 0.025 per stitch need 700 units of yarn.
S
Runs in your browser
🏠 Home, food & hobbiesFree
D&D armor class calculator
Studded leather with 16 Dexterity and a shield gives AC 17: a base of 12, plus 3 from Dexterity, plus 2 for the shield.
P
Runs in your browser
🏠 Home, food & hobbiesFree
D&D encounter XP budget calculator
Four level-5 characters have a Medium budget of 2000 XP; with 3 monsters the multiplier of 2 leaves 1000 XP of creatures to spend.
S
Runs in your browser
🏠 Home, food & hobbiesFree
D&D passive perception calculator
Wisdom +3 and a proficient +3 give a passive Perception of 16: 10, plus 3, plus 3. Add expertise, advantage or the Observant feat and see each term the Dungeon…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Catan number pip dots calculator
A 6 or an 8 in Catan carries five pip dots: five of the 36 two-dice rolls pay that hex. Enter any token from 2 to 12 and see its odds, its twin token and its…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Audio file size from sample rate
One minute of CD-quality stereo, 44,100 Hz at 16 bits, fills 10,584,044 bytes as a WAV file. Enter your sample rate, bit depth, channels and length to budget…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Note from interval and root calculator
A perfect fifth above C is G, and a major third above F sharp is A sharp, not B flat: pick a root, an interval from unison to octave and a direction, and get…
P
Runs in your browser
🏠 Home, food & hobbiesFree
Vibrating string fundamental frequency
A string 1 m long at 100 N with 0.01 kg/m sounds at 50 Hz: enter the speaking length, tension and linear density of a guitar, violin or piano string and get its…
S
Runs in your browser
🏠 Home, food & hobbiesFree
Beads per length calculator
A 180 mm bracelet holds exactly 30 beads of 6 mm with nothing left over. Enter the finished length in mm, cm or inches, the bead size and any knots or clasp…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Candle Wax Amount Calculator
Twelve 250 ml jars of wax at 0.9 g per ml need 2700 g, or 2.7 kg, for the whole batch. Enter one container's fill volume, your wax density and how many jars you…
K
Runs in your browser
🏠 Home, food & hobbiesFree
Macrame cord length calculator
A medium-density piece 80 long with 20 of fringe and 10 for the dowel needs 470 per working strand.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Resin volume for mold calculator
A 20 by 10 by 2 cm cavity holds 400 ml; two of them filled to 90 % take 720 ml, or 777.6 ml once you add 8 % for cup residue.
B
Runs in your browser
🏠 Home, food & hobbiesFree
Darts Three-Dart Average Calculator
501 points scored with 15 darts is 33.4 points per dart and a three-dart average of 100.2: enter the points and the darts thrown to compare any match, leg or…
K
Runs in your browser
🏠 Home, food & hobbiesFree
Marathon Pace from Goal Time Calculator
Finishing a marathon in 3:30:00 means holding about 4:59 per kilometre, an average of 12.056 km/h.
B
Runs in your browser
🏠 Home, food & hobbiesFree
Tennis tiebreak score calculator
At 6–5 in a seven-point tiebreak, player A serves next, needs 1 point and player B needs 3. Enter both scores and who served first to keep the serve rotation…
S
Runs in your browser
🏠 Home, food & hobbiesFree
Maximum Operating Depth Calculator for Nitrox and Trimix
Nitrox with 32 % oxygen at a limit of 1.4 bar reaches its maximum operating depth at 33.75 m, shown conservatively as 33 m: enter the analyzed oxygen and your…
B
Runs in your browser
🏠 Home, food & hobbiesFree
Hiking time with elevation calculator
Ten kilometres with 600 m up and 300 m down take about 3 hours 10 minutes: 120 minutes of walking, 60 of climbing and 10 of descent.
S
Runs in your browser
🏠 Home, food & hobbiesFree
Rowing 500m Split Calculator for Distance and Time
Rowing 2000 m in 7:20 is a 1:50.0 split per 500 m. Enter the distance you covered and the elapsed time in seconds, minutes or hours, and compare long and short…
K
Runs in your browser
🏠 Home, food & hobbiesFree
Even-pace split times calculator
A 10 km race at 5:00 per kilometre gives ten identical laps and a 50:00 finish. Enter the distance, your target pace and the split interval, and get the…
A
Runs in your browser
✍️ Text & AIFree
Count numbers in text
“Revenue rose from 12.5 to 18 units across 3 regions; variance was -0.25.” contains 4 numbers, 12.5, 18, 3 and -0.25, listed in reading order.
B
Runs in your browser
🏠 Home, food & hobbiesFree
Climbing rope impact force calculator
A test-style fall at factor 1.77 with an 80 kg climber on a rope of 20 kN modulus peaks a little above 8 kN, more than 10 times body weight: enter fall factor…
P
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.