Most Visited
Image
Random Bitmap Generator
Generate a random bitmap pattern of greyscale or colored squares, with a reproducible seed and batch ZIP download, directly in your browser.
FreeImage
Filters Image
Apply Instagram-style photo filters like Vintage, Lomo, or Sunrise, with intensity, vignette, and greyscale controls, directly in your browser.
FreeImage
Image Sharpen & Detail
Sharpen an image, apply edge enhancement, run edge detection, or remove noise, directly in your browser.
FreeImage
Image Stylize Effects
Apply emboss, glow, vignette, pixelate, or censor/redact effects to an image directly in your browser.
FreeImage
Image Split & Merge
Split an image into a grid of pieces, or merge multiple images into one, directly in your browser.
FreeImage
Image Flip & Rotate
Flip an image horizontally or vertically, or rotate it by 90°, 180°, or any custom angle directly in your browser.
FreeImage
Image Tint Effects
Apply Colorize (single-color tint) or Duotone (two-color gradient map) effects to an image with a live preview.
FreeImage
Image Histogram Equalizer
Boost contrast using histogram equalization, across the whole image or just a selected area.
FreeImage
Image Levels & Threshold
Adjust tonal range with Clip, Stretch (Levels), or Threshold (black & white) modes, with a live preview.
FreeImage
Image Channel Mixer
Independently scale the red, green, and blue channel intensity of an image with a live preview.
FreeImage
Image Vibrance Adjuster
Boost or reduce color vividness in an image while protecting already-vivid colors and grays, unlike a flat saturation change.
FreeImage
Brightness Contrast Image
Adjust the brightness and contrast of an image in your browser with a live preview, then download the result.
FreeImage
Blend Colors
Blend two colors together with an adjustable balance, using simple RGB, gamma-correct, or HSL blending.
FreeCalculators
ARM Mortgage Calculator
Model the worst-case payment scenario for an adjustable-rate mortgage, with payment shock, a year-by-year schedule, and a fixed-rate comparison.
FreeCalculators
Annuity Payout Calculator
Calculate a sustainable payout amount from a balance, or how long a fixed payment will last, right in your browser.
FreeCalculators
Angel Number Calculator
Discover the numerology meaning of a recurring number or your birth date Life Path Number, right in your browser.
FreeCalculators
Air Conditioner BTU Calculator
Estimate the air conditioning BTU capacity a room needs, with a multi-room whole-home total.
FreeDownloader
Odysee Video Downloader
Paste an Odysee video link and download it for offline viewing, for public videos. No account, no extension, no Odysee login.
FreeDownloader
SoundCloud Track Downloader
Paste a SoundCloud track link and download the public stream as an MP3 for offline listening. No account, no extension, no SoundCloud login.
FreeCalculators
CSR Viewer
Decode a PEM-encoded Certificate Signing Request (PKCS#10): Subject, public key, signature algorithm, and Subject Alternative Names, then verify its self-signature is actually valid.
FreeText
Bionic Reading Converter
Convert any text into bionic reading format by bolding the first portion of each word to help you read faster and focus better.
FreeText
Bcrypt Hash Generator Checker
Generate and verify bcrypt password hashes entirely in your browser using WebAssembly, with an adjustable cost factor and salt.
FreeText
Base64 Encode/Decode
Encode text to base64 or decode base64 back to text, live as you type, with full Unicode support and an optional URL-safe variant.
FreeCalculators
At Bats Per Home Run Calculator
Calculate a baseball player's AB/HR power-hitting ratio, see its performance tier, compare against real MLB career leaders, and solve for the at-bats or home runs needed to hit a target ratio.
FreeCalculators
Astronomical Unit Converter
Convert astronomical distances between AU, light-years, parsecs, kilometers, and more, with light-travel time and a cosmic scale visualization.
FreeCalculators
Arithmetic Mean Calculator
Calculate the arithmetic mean, median, mode, range, and both population and sample standard deviation of a dataset, with a dot plot and histogram.
FreeCalculators
Arctan2 Calculator
Calculate atan2(y, x), the angle of a point in the Cartesian plane, with quadrant detection, normalized angle, and a step-by-step breakdown.
FreeCalculators
AP Score Calculator
Estimate a rough AP exam score from your MCQ and FRQ results, clearly marked as unofficial.
FreeCalculators
Antilog Calculator
Calculate the antilogarithm (inverse log) of a number for base 10, e, 2, or a custom base, right in your browser.
FreeText
Anagram Generator
Find English anagrams and shorter words you can make from any word, right in your browser.
FreeCalculators
Amps To Watts Calculator
Convert between amps and watts for DC, AC single-phase, and AC three-phase circuits.
FreeText
Adler32 Checksum Calculator
Calculate the Adler-32 checksum of text or a file, right in your browser.
FreeVideo
Adjust Video Speed
Speed up or slow down a video and export it, right in your browser.
FreeText
Add Prefix And Suffix
Add the same prefix and/or suffix text to every line of a list, right in your browser.
FreeImage
Bulk Batch Adjust HSL Image
Apply the same hue, saturation, and lightness adjustment to many images at once, right in your browser.
FreeCalculators
A/B Test Sample Size Calculator
Find how many visitors per variant your A/B test needs, with support for multiple variants (Bonferroni-corrected) and a test duration estimate.
FreeCalculators
1099 Tax Calculator
Estimate your self-employment tax and federal income tax on 1099 income, with a quarterly payment breakdown and real IRS deadline dates. Free, private, runs in your browser.
FreeCalculators
0-60 & Quarter Mile Calculator
Estimate a car's quarter mile time and trap speed from its horsepower and weight, with a power-to-weight breakdown and reference-car comparison. Free, private, runs in your browser.
FreeGame
Click Speed Test (CPS Test)
The classic click test: click as fast as you can for 1 to 100 seconds with Left Click, Right Click, or Spacebar modes. Tracks your personal best for each mode and duration, your best 1-second burst, and gives you a rank title from Turtle to Godlike Clicker.
FreeMusic
Voice Recorder
Record audio from your microphone right in the browser: live level meter and waveform while recording, pause/resume, multiple takes with a visual waveform, rename, playback, and download as a standard audio file.
FreeCalculators
CIDR Calculator
Break down IPv4 or IPv6 CIDR blocks in bulk into network/broadcast address, subnet mask, and usable host range. Includes an IP-in-range checker and a subnet splitter.
FreeText
Caesar Cipher Tool
Encrypt or decrypt text with a classic Caesar cipher, with an A-Z mapping table, brute-force list, letter-frequency chart, and ROT13 shortcut.
FreeText
Blake2b Hash Generator
Compute the BLAKE2b hash of text or a file in your browser, with adjustable output length and optional keyed hashing (MAC).
FreeCalculators
Betting Odds Converter
Convert betting odds between American, Decimal, Fractional, and implied probability formats, with payout, profit, and bookmaker margin (vig) calculations.
FreeCalculators
Battery Life Calculator
Estimate how long a battery will last given its capacity, your device's power draw, and a real-world efficiency factor.
FreeCalculators
Basic Calculator
A simple, free online calculator for everyday arithmetic, with memory storage, scientific-notation entry, and keyboard support.
FreeText
Number Base Converter
Convert a number between binary, octal, decimal, hexadecimal, BCD, Gray Code, and any custom base from 2 to 36, all at once from a single input.
FreeText
Bar Graph Maker
Turn simple label,value data into a customizable bar chart with 8 color themes, orientation, sorting, negative-value support, instant stats, and SVG/PNG export.