NEXKIT
Wire Size & Voltage Drop Calculator
DIGITAL DOWNLOADNK-020
Wire Size & Voltage Drop Calculator
Cable sizing and voltage drop calculations for electrical work.
by NexKit
Provider: NexKit$3.00USDView
Digital tools by NexKit
Useful digital tools for work and everyday tasks.
Single-file web tools for business, productivity and everyday work.
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Bilingual tools appear in both. Each tool has one price and one download.
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NEXKIT
Password Manager
DIGITAL DOWNLOADNK-026
Password Manager
Local encrypted vault: 600k PBKDF2 iterations + AES-256-GCM, health checks, auto-lock.
by NexKit
Provider: NexKit$9.00USD
NEXKIT
File Encryptor
DIGITAL DOWNLOADNK-028
File Encryptor
AES-256-GCM file encryption: filenames and contents encrypted, NKENC1 package.
by NexKit
Provider: NexKit$5.00USD
NEXKIT
2FA Authenticator
DIGITAL DOWNLOADNK-030
2FA Authenticator
RFC 6238 TOTP two-factor auth: encrypted vault, timer ring, QR import.
by NexKit
Provider: NexKit$5.00USD
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Software ToolsBetter tools. Less friction.37 productsAI & ProductivityWork a little smarter.5 productsDesign & CreativeMake something unmistakable.4 productsDeveloper ToolsYour next idea, shipped.7 productsAudio & VideoSound and motion, handled.2 productsBusinessRun the numbers right.27 productsGames & EntertainmentPlay more.21 productsSmall tools. Real possibility.Great tools under $10.Collection
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Featured tools
Our flagship tools and bundles, hand-picked to get you going.
NEXKIT
PDF Toolbox
DIGITAL DOWNLOADNK-013
PDF Toolbox
Seven PDF tools in one offline file: merge, split, rotate, watermark, page numbers and more.
by NexKit
Provider: NexKit$3.00USD
NEXKIT
PDF Seal Tool
DIGITAL DOWNLOADNK-024
PDF Seal Tool
Bilingual PDF stamping tool — compose seals, check them at real size, export. Fully offline.
by NexKit
Provider: NexKit$15.00USD
Free forever · 永久免费
Free tools & games · 免费工具与游戏
No payment and no account — every tool opens in your browser. Share them with anyone. 免费使用，无需注册，直接在浏览器里打开，欢迎分享给朋友。
NEXKIT
JSON Formatter & Validator
DIGITAL DOWNLOADNK-F001
JSON Formatter & Validator
Format, minify and validate JSON in your browser. Free, no account, nothing uploaded.
by NexKit
Provider: NexKitFreeView
NEXKIT
Unix Timestamp Converter
DIGITAL DOWNLOADNK-F002
Unix Timestamp Converter
Convert Unix timestamps and readable dates, in UTC and your local time. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Color Picker & Converter
DIGITAL DOWNLOADNK-F003
Color Picker & Converter
Convert HEX, RGB and HSL colors or pick a color from an image. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Image Compressor
DIGITAL DOWNLOADNK-F004
Image Compressor
Compress images in your browser for free. No upload, no account.
by NexKit
Provider: NexKitFreeView
NEXKIT
Rent vs Buy Calculator (Trial)
DIGITAL DOWNLOADNK-F005
Rent vs Buy Calculator (Trial)
Trial: single-scenario rent vs buy estimate with breakeven year. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Shift Schedule Generator (Trial)
DIGITAL DOWNLOADNK-F006
Shift Schedule Generator (Trial)
Trial: rotating shift schedules up to 7 days with click-to-swap. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Text Compare Tool (Trial)
DIGITAL DOWNLOADNK-F007
Text Compare Tool (Trial)
Trial: line-level text diff, up to 100 lines per side. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Lucky Draw Wheel 抽奖转盘
DIGITAL DOWNLOADNK-F008
Lucky Draw Wheel 抽奖转盘
Spin a lucky draw wheel for giveaways, classroom picks and team raffles. Free, in your browser.
by NexKit
Provider: NexKitFreeView
Just added
New arrivals
The latest tools to join the shelf.
NEXKIT
Snake 贪吃蛇 · Classic Arcade Game
DIGITAL DOWNLOADNK-F024
Snake 贪吃蛇 · Classic Arcade Game
Classic Snake: eat, grow, and avoid the walls and your own tail. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
2048 · Number Puzzle 数字拼图
DIGITAL DOWNLOADNK-F025
2048 · Number Puzzle 数字拼图
Slide and merge tiles to reach 2048. Free number puzzle, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Minesweeper 扫雷 · Classic Puzzle Game
DIGITAL DOWNLOADNK-F026
Minesweeper 扫雷 · Classic Puzzle Game
Classic Minesweeper: clear the field, flag the mines, beat the clock. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Sudoku 数独 · Logic Puzzle Game
DIGITAL DOWNLOADNK-F027
Sudoku 数独 · Logic Puzzle Game
Classic Sudoku with three difficulties and unique-solution puzzles. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Connect Four 四子棋 · Two-Player Board Game
DIGITAL DOWNLOADNK-F028
Connect Four 四子棋 · Two-Player Board Game
Two-player Connect Four: drop discs, connect four to win. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Pong 乒乓 · Classic Arcade Game
DIGITAL DOWNLOADNK-F029
Pong 乒乓 · Classic Arcade Game
Classic Pong vs the computer: first to 7 points wins. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
UUID Generator UUID 生成器
DIGITAL DOWNLOADNK-F016
UUID Generator UUID 生成器
Bulk-generate UUID v4 IDs with uppercase and no-hyphen options. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Age Calculator 年龄计算器
DIGITAL DOWNLOADNK-F017
Age Calculator 年龄计算器
Exact age in years, months and days, plus birthday countdown and zodiac. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Typing Speed Test 打字速度测试
DIGITAL DOWNLOADNK-F018
Typing Speed Test 打字速度测试
30 or 60 second typing tests in Chinese and English with live speed and accuracy. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Percentage Calculator 百分比计算器
DIGITAL DOWNLOADNK-F019
Percentage Calculator 百分比计算器
Percent-of, percent change and discount math, computed live. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Tic-Tac-Toe 井字棋
DIGITAL DOWNLOADNK-F020
Tic-Tac-Toe 井字棋
Tic-tac-toe vs an unbeatable AI or a friend, with round scores. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Whack-a-Mole 打地鼠
DIGITAL DOWNLOADNK-F021
Whack-a-Mole 打地鼠
30-second whack-a-mole rounds with best-score tracking. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Pixel Flyer 像素飞行
DIGITAL DOWNLOADNK-F022
Pixel Flyer 像素飞行
Guide the ship through energy gates — tap, click or space to fly. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Simon Sequence 颜色序列记忆
DIGITAL DOWNLOADNK-F023
Simon Sequence 颜色序列记忆
Watch the color sequence and repeat it — one mistake ends the run. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Lucky Draw Wheel 抽奖转盘
DIGITAL DOWNLOADNK-F008
Lucky Draw Wheel 抽奖转盘
Spin a lucky draw wheel for giveaways, classroom picks and team raffles. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Image to Base64 Converter 图片转 Base64
DIGITAL DOWNLOADNK-F009
Image to Base64 Converter 图片转 Base64
Convert images to Base64 data URLs with drag & drop and one-click copy. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Word & Character Counter 文本字数统计
DIGITAL DOWNLOADNK-F010
Word & Character Counter 文本字数统计
Live word, character, line and paragraph counts with a reading-time estimate. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Stopwatch & Timer 在线秒表计时器
DIGITAL DOWNLOADNK-F011
Stopwatch & Timer 在线秒表计时器
Stopwatch with laps plus a countdown timer with chime alert. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Brick Breaker 打砖块
DIGITAL DOWNLOADNK-F012
Brick Breaker 打砖块
Classic brick breaker: smash every brick with 3 lives on the line. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Memory Match 记忆翻牌
DIGITAL DOWNLOADNK-F013
Memory Match 记忆翻牌
Flip and match all 8 pairs from 16 cards — time and moves scored. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Gomoku (Five in a Row) 五子棋双人对战
DIGITAL DOWNLOADNK-F014
Gomoku (Five in a Row) 五子棋双人对战
Two-player Gomoku on a 15×15 board: first to five in a row wins. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Sliding Number Puzzle 数字华容道
DIGITAL DOWNLOADNK-F015
Sliding Number Puzzle 数字华容道
Slide the tiles back into order — every shuffle solvable, moves and time scored. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Rent vs Buy Calculator (Trial)
DIGITAL DOWNLOADNK-F005
Rent vs Buy Calculator (Trial)
Trial: single-scenario rent vs buy estimate with breakeven year. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Shift Schedule Generator (Trial)
DIGITAL DOWNLOADNK-F006
Shift Schedule Generator (Trial)
Trial: rotating shift schedules up to 7 days with click-to-swap. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Text Compare Tool (Trial)
DIGITAL DOWNLOADNK-F007
Text Compare Tool (Trial)
Trial: line-level text diff, up to 100 lines per side. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Image Compressor
DIGITAL DOWNLOADNK-F004
Image Compressor
Compress images in your browser for free. No upload, no account.
by NexKit
Provider: NexKitFreeView
NEXKIT
JSON Formatter & Validator
DIGITAL DOWNLOADNK-F001
JSON Formatter & Validator
Format, minify and validate JSON in your browser. Free, no account, nothing uploaded.
by NexKit
Provider: NexKitFreeView
NEXKIT
Unix Timestamp Converter
DIGITAL DOWNLOADNK-F002
Unix Timestamp Converter
Convert Unix timestamps and readable dates, in UTC and your local time. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Color Picker & Converter
DIGITAL DOWNLOADNK-F003
Color Picker & Converter
Convert HEX, RGB and HSL colors or pick a color from an image. Free, in your browser.
by NexKit
Provider: NexKitFreeView
NEXKIT
Loan Amortization Calculator
DIGITAL DOWNLOADNK-019
Loan Amortization Calculator
Full amortization schedules for any loan, with charts.
by NexKit
Provider: NexKit$3.00USDView
NEXKIT
Wire Size & Voltage Drop Calculator
DIGITAL DOWNLOADNK-020
Wire Size & Voltage Drop Calculator
Cable sizing and voltage drop calculations for electrical work.
by NexKit
Provider: NexKit$3.00USDView
NEXKIT
Engineering Unit Converter
DIGITAL DOWNLOADNK-021
Engineering Unit Converter
40+ engineering units — pressure, torque, flow and more — converted as you type.
by NexKit
Provider: NexKit$3.00USDView
How it works
From click to ready in minutes
- 1
Choose your tool
Every product page lists what the tool does, its interface language and compatibility.
- 2
Pay securely with Paddle
Paddle, our merchant of record, takes the payment and any applicable tax. NexKit never sees your card details.
- 3
Download and use
Follow the delivery instructions on the product page.
Payments, tax and refunds are handled by Paddle under its buyer terms. How payments work