AlpaKit Free Online Toolkit
Fast, beautiful, privacy-first free tools
Personal Workspace
Personalized workspace and history
Lorem Ipsum Generator
Generate Latin, Traditional Chinese, and English placeholder text in plain text or HTML.
UUID Generator (v4 & v7)
Generate RFC 9562 UUID v4 or time-ordered v7 in bulk with case and format options.
URL Encoder & Decoder
Percent-encode or decode URLs and query parameters with encodeURI or encodeURIComponent.
Case Converter
Convert text between UPPER CASE, lower case, Title Case, Sentence case, camelCase, and snake_case.
Lunar Calendar Converter
Convert between Gregorian and Chinese Lunar dates (1901–2100) with Ganzhi year, zodiac, and leap month info.
Chinese Capital Amount Converter
Convert numbers into formal Chinese capital amounts for cheques and receipts, or parse them back into digits.
ROC Year Converter
Convert a year between Taiwan ROC (Minguo) and Gregorian calendars, e.g. ROC 115 = 2026.
Taiwan Salary & Labor/Health Insurance Calculator (2026)
Calculate Taiwan monthly take-home pay (Net Pay), Labor Insurance (勞保), National Health Insurance (健保), and Labor Pension (勞退) contributions using official 2026 (ROC Year 115) government grade tables.
Chinese Simplified ⇄ Traditional Converter (OpenCC)
Convert between Simplified Chinese and Traditional Chinese online using OpenCC. Supports Taiwan localized phrases (s2twp / tw2sp) and character-only conversion, 100% client-side.
Image Compressor
Compress JPG, PNG, and WebP images online in batch. Adjust quality slider, resize max width, or convert to WebP/JPEG. 100% client-side in your browser with zero uploads.
Taiwan Business ID Validator (統一編號)
Validate 8-digit Taiwan Unified Business Numbers (UBN / 統一編號). Supports the April 2023 modulo-5 rule, legacy modulo-10 rule, special 7th-digit logic, and batch processing.
Taiwan National ID & Resident Certificate Validator (身分證/居留證)
Validate Taiwan National ID numbers (身分證) and Alien Resident Certificates (ARC / 居留證). 100% client-side privacy-first validation with zero tracking or uploads.
Taiwan Receipt Lottery Checker (統一發票)
Check Taiwan Uniform Invoice lottery (統一發票) winning numbers. Features instant 3-digit quick match, 8-digit prize calculation, and historical records synced with the Ministry of Finance.
Audio Trimmer & Fade In / Out
Trim audio locally, adjust fades and volume, select a waveform range and preview before exporting WAV. Channels are preserved; audio is not uploaded.
SRT & VTT Subtitle Editor and Time Shifter
Edit plain-text SRT and VTT subtitles locally, shift all timings, convert formats or export text, and optionally preview a local video. Files are not uploaded.
Browser FPS & WebGL Smoothness Test
Measure browser animation smoothness with a fixed WebGL 3D scene. See average FPS, frame intervals and long frames, with results calculated locally and no installation.
Headphone & Speaker Left Right Test
Test left, right and both audio channels or alternate sides to identify headphone and speaker orientation. No microphone required; audio is generated locally.
Mouse Button, CPS & Double Click Test
Test mouse buttons, scroll wheel, click speed and double-click intervals with browser movement event estimates. All processing stays local.
Dead Pixel, Backlight Bleed & Screen Color Test
Check dead pixels, backlight bleed, grayscale, gradients and display uniformity in fullscreen with custom colors and automatic playback.
HTML Entity & Character Coder
Encode/decode HTML entities and copy special characters or emojis from a searchable grid panel.
CSS Flexbox & Grid Layout Generator
Visually configure and preview CSS Flexbox and Grid grid layouts, view animations, and copy CSS code.
JS/JSON Minifier & Obfuscator
Compress, beautify, and obfuscate JavaScript/JSON code locally, showing size comparison.
Password Strength & Leak Analyzer (HIBP Breach Check)
Check password entropy, estimate crack time, and securely test if leaked in historical breaches.
Audio & Waveform Generator (with Metronome & Tuner)
Generate various audio waveforms, adjust frequency (Hz), metronome, and display visual oscilloscope animation.
Word Counter
Count words, characters, paragraphs, and estimate reading time instantly.
JSON Formatter & Validator
Beautify, minify, validate and debug JSON syntax errors.
Image Resizer & Converter
Resize and convert images (PNG/JPG/WebP) locally inside your browser.
Password Generator - Strong Random Password & UUID Generator
Generate strong passwords and check crack time offline.
Color Palette Generator
Generate beautiful color schemes and export HEX/RGB values.
Base64 & URL Encoder/Decoder with MD5 & SHA-256 Hash
Encode and decode Base64/URL instantly with MD5 & SHA-256 hash generation.
Regex Tester & Helper
Test regular expressions with real-time highlighting and common syntax presets.
Markdown Live Editor
Write Markdown with real-time HTML preview. Export as Markdown or copy HTML.
SVG Optimizer & Minifier
Clean and optimize SVG code locally with file size comparison and live preview.
EXIF Viewer & Purger
Inspect image EXIF/GPS metadata and strip private information locally for safe download.
CSS Gradient Generator
Design linear and radial gradients visually, explore curated presets and export CSS code.
Lorem Ipsum & Mock Data Generator
Generate Lorem Ipsum dummy texts and mock API schema structures to export as JSON.
Text Cleaner: Remove Extra Spaces & Blank Lines
Clean up pasted text online: trim extra spaces, delete empty and duplicate lines, find and replace, and change case (UPPERCASE, lowercase, Title Case, camelCase, snake_case).
Random Picker & Wheel of Fortune
Enter list items to spin a colorful lucky wheel and pick winning slots instantly.
Date Calculator: Days Between Dates, Add Days, Countdown
Free date calculator: count the days between two dates, add or subtract days from any date (for example 100 days from today), and build a live countdown timer.
Number Base Converter (Binary / Octal / Decimal / Hex)
Instantly convert large numbers between Binary, Octal, Decimal, and Hexadecimal with a hacker-style matrix rain effect.
Length & Distance Converter (Metric / Imperial / Taiwanese)
Convert between meters, centimeters, kilometers, inches, feet, yards, miles, and Taiwanese foot in real-time.
Weight & Mass Converter (kg / lb / Taiwanese Catty)
Convert between kilograms, grams, metric tons, pounds, ounces, and Taiwanese Catty/Liang in real-time.
Area & Land Converter (㎡ / Ping / Hectare / Jia)
Convert between square meters, Taiwanese Pings, hectares, Jia, square kilometers, and square feet in real-time.
Temperature Converter (Celsius / Fahrenheit / Kelvin)
Accurately convert between Celsius, Fahrenheit, and Kelvin with animated alpaca temperature sensor effects.
Data Storage & Bandwidth Converter (B/KB/MB/GB/TB/Mbps)
Convert B, KB, MB, GB, TB and PB instantly (binary, 1 KB = 1024 B) and switch network speeds between bps, Mbps and Gbps, all in your browser.
JWT Decoder & Parser
Decode and inspect JWT JSON structures (Header/Payload/Signature) and view expiration metadata.
QR Code Generator & Decoder
Generate QR Codes (with custom colors/logo) and decode QR Code images offline in your browser.
Cryptographic Hash Generator
Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes for texts and local files instantly.
SQL Formatter & Beautifier
Format, indent, and beautify SQL queries with case conversion for keywords.
Color Converter & Contrast Checker
Convert HEX/RGB/HSL/CMYK formats and check WCAG 2.1 accessibility color contrast ratio.
CSS Shadow & Glassmorphism Generator
Fine-tune CSS shadow and backdrop-filter glassmorphism effects, export CSS instantly.
Cron Parser & Generator
Configure Cron schedule visually, parse expressions to readable text, and predict execution times.
Text Diff Checker
Compare texts and code locally in your browser with word/line highlighting to guarantee privacy.
User Agent (UA) Parser & Client Info
Inspect your browser, OS, hardware, engine details, or analyze any pasted User Agent.
Color Contrast & Accessibility Checker
Calculate text & background contrast ratio based on WCAG 2.1 standards, fix colors automatically, extract color palettes from drag-and-drop images, and simulate color blindness.
Image Pixel Art & Lego Maker
Convert any photo into pixel art instantly! Supports Hama Beads and Lego building block mosaic grid modes, counts color brick distribution, and exports PNG/SVG.
Physics Sandbox & Gravity Simulator
Simulate 2D physics particles with gravity, elasticity, friction, gyroscope gravity, and mouse attraction. Mascot Alpa turns into a physical particle bouncing around!
PDF Password Remover & Unlocker
Remove a PDF’s open password (when you know it) and copy/print restrictions locally, then export an unrestricted PDF.
PDF to Image Converter
Render and convert PDF pages into high-quality PNG/JPG images locally, downloading as a single ZIP.
PDF Electronic Signature & Annotator
Place handwritten or image signatures anywhere on your PDF. Drag, resize, and sign contracts locally.
PDF Watermark & Logo Adder
Add batch text watermarks or brand logos to PDF pages with rotation, opacity, and grid tiling options.
PDF Page Rotator & Cropper
Rotate inverted PDF pages (90°/180°/270°) visually or crop margins to remove empty borders.
PDF Page Numberer
Insert custom formatted page numbers into PDF header or footer, setting alignment, margin, and fonts.
PDF Text & Markdown Extractor
Extract clean text from PDF and format as Markdown/TXT structure, perfect for LLM prompt files and notes.
PDF Metadata Viewer & Security Diagnostic
Read PDF metadata details and security permissions list, with direct password removal capability.
Visual SVG Path Editor
Click to place anchors, drag Bézier handles on a 500×500 canvas, and instantly get the SVG path d attribute and a CSS clip-path: path() rule. Includes heart and star presets.
2.5D Mechanical Keyboard Tester
Test your keyboard layout and keys in browser with a premium 2.5D model, physical sound simulation for Blue/Red/Brown switches, and Alpa fighting keys in boxing gloves!
Image to PDF Converter
Convert multiple JPG/PNG images to a single PDF document locally. Supports drag-and-drop sorting, page orientation, and margins.
TDEE & BMR Calculator
Estimate your Body Mass Index (BMI), Basal Metabolic Rate (BMR), and Total Daily Energy Expenditure (TDEE) with macro nutrient suggestions.
Simple & Compound Interest Calculator
Simulate lump-sum deposits or monthly regular investments, support custom compounding frequencies, and plot interest growth charts.
Sleek Browser Mockup & Screenshot Beautifier
Upload your webpage screenshot, wrap it with a premium macOS browser frame, drop shadows, and beautiful gradient backdrops, and export high-res PNG.
Universal File Metadata Purger
Scrub metadata from images (EXIF/GPS) and office documents (PDF/Word) 100% locally in your browser to protect privacy.
Beautiful Code Screenshot Generator
Wrap your code snippets into beautiful social-ready images with macOS window mockups, glow shadow, and gradient backplates.
Universal Table & Spreadsheet Converter
Paste copied Excel cells or CSV data to instantly generate Markdown tables, JSON arrays, or HTML tables.
Unix Epoch Timestamp Converter
Display live current epoch timestamp and support dual-directional conversions between timestamps and readable dates.
Gamepad & Controller Online Tester (Beta)
Test your gaming controllers (Xbox, PS5, Switch) instantly using HTML5 Gamepad API with button feedback and drift checkers.
Lucky Draw & List Randomizer
Paste a list of names to draw winners or randomly shuffle the list. Features neon rolling animations and drumroll sound effects.
CSS Neon & Glowing Text Generator
Visually adjust multi-layer text-shadow, neon glow radius, colors, and flashing rate, then copy CSS code.
Secure Local PDF Compressor
Compress PDF image resolution and quality 100% locally in your browser with size comparison and zero leak risk.
Web Text-to-Speech (TTS) Reader
Read text aloud with your browser's built-in Web Speech API. Pick a voice, adjust speed, pitch and volume; long text is split into chunks automatically.
Online Webcam Test, Camera Preview & Snapshot
Test your webcam, resolution, frame rate and camera switching with mirror preview, composition grid and private local snapshots.
Online Microphone Test & Live Waveform
Test microphone input, live volume, peak level, clipping and waveform with a private 30-second local recorder. Audio never leaves your device.
Percentage, Discount & Percent Change Calculator
Calculate percentages, ratios, percentage increases or decreases, price changes, discounts, savings, and final totals with formulas.
Fraction to Decimal & Percentage Converter
Instantly convert between fractions, decimals, and percentages, showing simplification steps, reciprocal, and interactive pie charts.
IG Line Breaker & Invisible Space Generator
Convert regular line breaks to Instagram/Threads compatible invisible characters (U+2800) with character counter.
Secure Local PDF Merger & Organizer
Merge and rearrange multiple PDF files 100% locally in your browser with drag-and-drop page sorting and zero privacy leak.
Focus Ambient Noise & Lo-Fi Mixer
Customize mixing levels of multiple environmental audio tracks (rain, bonfire, forest birds, screaming llama, Lo-Fi beats) with built-in Pomodoro sleep timer.
Mortgage & Loan Interest Calculator
Calculate amortizations for equal payment or equal principal plans instantly with grace period support, pie charts, and payment schedule tables.
Instagram Caption Grid Splitter & Cropper
Split a single image locally into 3x3, 3x1, or 3x2 grid layouts with preview order numbers and download instantly as a ZIP file.
Secure Local Image Watermark Adder
Add text or logo watermarks to your product photos or identity cards 100% locally. Support grid tiling, opacity, and rotation with zero upload.
Online Screen Recorder & Video Trimmer
Record your screen, a window or a browser tab with microphone and tab audio, entirely in your browser. Trim a clip and download it as WebM (MP4 in Safari).
Smart Image Color Picker with Pixel Loupe
Extract colors from local images using a pixel-art style precision loupe. Support HEX, RGB, HSL copies and WCAG color contrast validation.
Secure Local PDF Page Splitter
Split and extract pages from your PDF files 100% locally. Support visual selection, page range codes, and output as single PDF or ZIP safely.
Premium World Clock & Timezone Tracker
Elegant SVG analog and digital clocks with dynamic day/night gradients and relative offset helper.
Lo-Fi Rain Piano & Focus Music Box
Synthesize gentle Lo-Fi piano chords locally using Web Audio API, featuring canvas rain drops hitting virtual piano keys.
cURL Code Converter
Convert cURL commands to JavaScript Fetch, Axios, Python, and Go code instantly for rapid development.
Markdown Mindmap & Outline Generator
Enter plain Markdown outline to render futuristic neon-gradient mindmaps on Canvas instantly, supporting SVG/PNG exports.
Pomodoro Timer & Focus Todo Board
Features a glassmorphic circular progress timer, integrated todo task manager, and ambient sound player to boost productivity.
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