💻Tech
Subnet calculator and network utilities.
Browse tech calculators and utility tools for networking, development, device math, and everyday technical tasks. This category includes subnet and CIDR tools, IP address calculators, bandwidth and download-time estimators, JSON and encoding utilities, QR code and UUID generators, binary and hex tools, aspect-ratio math, DPI checks, color conversion, and other focused utilities that save time when precision matters.
What You'll Find Here
You will find several kinds of technical tools in one place. Networking tools help with subnet masks, address ranges, CIDR notation, and IP planning. Transfer and systems tools help with bandwidth, file-size, wattage, and download-time estimates. Developer utilities help with JSON formatting, Base64, URL encoding, hashes, UUIDs, and text or binary conversion. Visual and display tools help with aspect ratio, DPI, color values, and project-specific layout math. The category is meant for short technical jobs where a wrong conversion or copied string can create avoidable rework.
All Tech Tools
Subnet Calculator
Calculate the subnet mask, network address, broadcast address, and usable host range from any IP address and CIDR prefix, with results for IPv4 networks.
Open toolJSON Formatter
Use this free JSON formatter to validate, beautify, and minify JSON in your browser with clear syntax feedback and no server upload.
Open toolURL Encoder Decoder
Use this URL encoder decoder to safely encode or decode URL components and handle invalid encoded input clearly.
Open toolBase64 Encoder Decoder
Encode text to Base64 or decode Base64 back to UTF-8 text. Useful for API payload checks, auth headers, data URLs, and quick debugging in the browser.
Open toolQR Code Generator
Create a downloadable QR code from text or a URL, choose a size, and check input length before you share or print it.
Open toolBandwidth Calculator
Use this bandwidth calculator to estimate required bandwidth from data size and transfer time with unit conversion support.
Open toolDownload Time Calculator
Use this download time calculator to estimate transfer time from file size and connection speed with unit conversion support.
Open toolData Transfer Calculator
Use this data transfer calculator to estimate transfer time, required speed, or transferable size with explicit unit assumptions.
Open toolIP Address Calculator
Use this IP address calculator to analyze any IPv4 address, including its binary form, integer value, address class, and common private or reserved ranges.
Open toolCIDR Calculator
Use this CIDR calculator to turn IPv4 CIDR notation into a subnet mask, network address, broadcast address, and usable host range in one step.
Open toolBinary Calculator
Add, subtract, multiply, or divide binary numbers and see the result in both binary and decimal with clear examples, limits, and base-2 math notes.
Open toolHex Calculator
Calculate hexadecimal addition, subtraction, multiplication, and integer division. Accepts optional 0x prefixes and shows both hex and decimal results.
Open toolUUID Generator
Generate UUIDs in your browser with this UUID generator. Client-side generation only, with UUID v4 support.
Open toolHash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes client-side. Hashes are one-way and not encryption.
Open toolAspect Ratio Calculator
Use this aspect ratio calculator to simplify width and height, compare common screen ratios, and resize images or video dimensions without stretching the frame.
Open toolDPI Calculator
Calculate DPI or PPI from pixels and physical size, then use the result to judge monitor sharpness, print size, poster quality, and image scaling assumptions.
Open toolBinary Translator
Translate text to binary and binary back to text. Each character becomes an 8-bit binary group using UTF-8, so accents and emoji convert correctly.
Open toolColor Converter
Convert any color between HEX, RGB, and HSL. Paste a hex code, an rgb value, or an hsl value and get all three formats back, with a live color swatch.
Open toolMinecraft Circle Generator
Generate pixel-perfect circle and sphere blueprints for Minecraft builds. Pick any diameter up to 256 and get a block-by-block layout grid.
Open toolWatt Calculator
Calculate power in watts from voltage, current, and resistance using Ohm's law. Enter any two values and get watts, amps, volts, and ohms.
Open toolHex to Text Converter
Convert hexadecimal to readable text and back. The hex bytes 48 65 6c 6c 6f decode to the word Hello. Handles spaces, 0x prefixes, and full UTF-8.
Open tooleDPI Calculator
Calculate your eDPI by multiplying mouse DPI by in-game sensitivity. 800 DPI at 0.35 sens is 280 eDPI, a typical pro Valorant setting. Compare across setups.
Open toolKD Ratio Calculator
Calculate your KD ratio and KDA ratio from kills, deaths, and assists. See both stats instantly with the standard zero-death display rule used in game UIs.
Open toolNether Portal Calculator
Convert Minecraft coordinates between the Overworld and the Nether using the exact 1 to 8 scale ratio. Enter X and Z to find where to build your linked portal.
Open toolParallel Resistor Calculator
Find the total resistance of resistors in parallel or in series. Enter up to four values, pick a wiring mode, and get the equivalent resistance in ohms instantly.
Open toolHP to Amps Converter
Convert motor horsepower to amps for single-phase and three-phase circuits. Enter HP, voltage, power factor, and efficiency to get full-load current.
Open toolWatt-Hours Calculator
Calculate watt-hours from watts and hours, or solve for power or time. Convert to kilowatt-hours. Free energy calculator for batteries and appliances.
Open toolBattery Charge Time Calculator
Estimate how long a battery takes to charge from your capacity, current and target percentage, charger current, and real-world charging efficiency.
Open toolPlayback Speed Calculator
Find out how long a video or audio takes at 1.25x, 1.5x, or 2x speed and how much time you save. A 60 minute video at 1.5x takes 40 minutes, saving 20 minutes.
Open toolFeatured Tools
Playback Speed Calculator
Find out how long a video or audio takes at 1.25x, 1.5x, or 2x speed and how much time you save. A 60 minute video at 1.5x takes 40 minutes, saving 20 minutes.
FeaturedBattery Charge Time Calculator
Estimate how long a battery takes to charge from your capacity, current and target percentage, charger current, and real-world charging efficiency.
FeaturedHP to Amps Converter
Convert motor horsepower to amps for single-phase and three-phase circuits. Enter HP, voltage, power factor, and efficiency to get full-load current.
Grouped by Topic
Technical calculators work best when the inputs stay explicit. A small mistake in units, prefixes, encoding, or notation can change the result completely. Bits and bytes are different. Decimal and binary storage naming may not match. CIDR notation changes address counts. Image dimensions, DPI, and aspect ratio answer related but separate questions. Encoded strings can fail because of one missing character. These tools help you move faster, but they also work as a second set of eyes by making the structure of the input and output easier to verify before you ship, deploy, upload, or share the result.