Browser tools for everyday tasks
Use practical utilities for text, data, media, documents, security, and more. Inputs are processed in your browser and are not sent to QuickKit servers.
Browse by category
On-device AIAI tools that run in your browser · 10 toolsCalculatorsEveryday, health, and finance calculations · 18 toolsTime & ProductivityStopwatches, timers, and clocks · 9 toolsText & DataProcess text and structured data · 14 toolsConvertersConvert units, number bases, and formats · 11 toolsGeneratorsGenerate passwords, UUIDs, and sample data · 9 toolsEncoding & DecodingEncode, decode, and hash data · 9 toolsSecurity & CryptoEncryption, tokens, and key generation · 4 toolsDesign & CSSColors, gradients, and CSS utilities · 8 toolsDocument & PDFCreate, merge, and split PDF files · 18 toolsMedia & RecordingAudio, video, and image tools · 19 toolsHardware TestCheck input and display hardware · 7 toolsNetworkInspect and measure network settings · 5 tools
On-device AI
AI tools that run in your browserAI Image Classifier and Automatic Tagger
Classify an image with a ViT model and inspect the five most likely English ImageNet labels with their scores.
Language Detector | Identify Text Languages Online
Compare text of at least 10 characters with franc n-gram statistics in the browser and view the nearest language candidates with relative scores.
AI Image Object Detector
Analyze a photo with DETR and display English labels, bounding boxes, scores, and counts for COCO's 80 object categories.
Image OCR and Text Extractor
Recognize Korean, English, Japanese, or Simplified Chinese text in images, screenshots, and document photos as editable text.
PII Detector and Text Masking Tool
Mask structured patterns such as email and phone numbers, with optional BERT NER detection for candidate names, organizations, and locations.
AI Review Sentiment and Star Rating Analyzer
Classify a review or comment in one of six supported European languages and inspect its 1–5 star distribution and sentiment bucket.
Semantic Sentence Similarity Calculator
Encode two sentences with multilingual MiniLM and display their cosine similarity as a percentage with an interpretive range.
AI English Text Summarizer
Summarize a longer English passage with DistilBART in the browser, then review and copy the generated result.
Calculators
Everyday, health, and finance calculationsAge, Birthday, and Elapsed Days Calculator
Calculate completed age, exact elapsed time, elapsed days, and days until a birthday from a birth date and reference date.
Adult BMI and Healthy Weight Range Calculator
Use metric or US height and weight to calculate adult BMI, its WHO classification, and a healthy-weight range for your height.
BMR and Maintenance Calorie Calculator
Calculate adult basal metabolic rate and estimated maintenance calories with Mifflin-St Jeor and explicit activity factors.
Business Day Calculator | Count or Add Working Days
Count business days in a date range or add and subtract working days with configurable weekends and custom excluded dates.
Basic Arithmetic Calculator
A safe browser calculator for decimal arithmetic, signs, and parentheses.
Compound Interest Calculator
Calculate ending balance, contributed principal, and earned interest from a starting amount, monthly deposits, nominal rate, and frequency.
Date Calculator | Difference, Add or Subtract Dates
Find total days and calendar years, months, and days between dates, or add and subtract signed years, months, weeks, and days.
Fraction Calculator | Simplify, Mixed Number & Decimal
Use exact BigInt arithmetic for large integer fractions and show simplified improper, mixed-number, and 12-place decimal forms.
Fuel Cost Calculator | Distance, MPG & Round-Trip Estimate
Estimate fuel and shared trip cost from distance, km/L, L/100 km or US MPG, price per liter, trip count, and round trips.
GPA Calculator | Credit-Weighted Course Average
Weight course grade points by credits on 4.0, 4.3, 4.5, or custom scales and total completed credits.
Loan Payment Calculator
Calculate the monthly payment, total interest, payoff date, and annual principal-interest split for a fixed-rate loan.
Mortgage Extra Payment Calculator
Derive financed principal from price and down payment, then compare how extra monthly principal changes interest and payoff time.
Percentage Calculator
Calculate a percentage of a value, a ratio, or percent change with explicit formulas.
Time Calculator | Difference, Add, Subtract & Day Rollover
Find a clock-time difference with explicit overnight handling, or add and subtract time while reporting day rollover.
Time & Productivity
Stopwatches, timers, and clocksOnline Countdown Timer with Alarm
Set hours, minutes, and seconds, pause when needed, and get an optional alarm when time runs out.
Country Holiday Calendar and Local Schedule Planner
View public holidays by country and keep personal events in your browser. Includes month, week and day views, recurring events, JSON backups and ICS calendar export.
D-Day Calculator and Date Countdown
Track time remaining until a date or time, or time elapsed since it, with live D-Day labels.
Personal Kanban Board · Tasks and Project Flow
Add cards quickly to your own boards and columns, then safely keep details, due dates and priorities in your browser.
List Rooms · Personal Checklists and Item Organizer
Organize shopping lists, packing checklists and belongings in your own rooms and lists. Add names quickly, save in your browser, copy formatted text and keep JSON backups.
Online Metronome and BPM Tempo Tool
Practice with an adjustable 30–300 BPM metronome, time signatures, downbeat accent, and volume.
Online Pomodoro Focus Timer
An accurate online Pomodoro timer with optional tasks, focus history, notifications, and a distraction-free focus view.
Text & Data
Process text and structured dataBulk File Renamer | Download a ZIP
Preview file names safely in your browser and download renamed copies in a ZIP.
Case Converter for Developer Naming Styles
Convert English text into camelCase, PascalCase, snake_case, and six other naming styles at once.
Find and Replace Text Online
Find literal text or regular-expression matches and replace the first occurrence or every occurrence.
Live Markdown Preview and HTML Viewer
Write GitHub-flavored Markdown beside a live preview and copy the sanitized rendered HTML.
Auto-Saving Browser Notepad
Keep multiple text notes in browser storage and export any note as a UTF-8 TXT file.
Regex Tester with Match and Replace Preview
Test JavaScript regular expressions with match positions, capture groups, highlighting, and replacement output.
URL Slug Generator
Turn titles and phrases into hyphenated or underscored URL slugs with optional Korean character retention.
Excel & CSV Spreadsheet Comparison
Compare two CSV or XLSX sheets by row position or unique keys and inspect added, removed, changed, and structural differences in your browser.
Excel & CSV Anonymization and Mock Data Studio
Choose exactly which XLSX or CSV columns to change, or create deterministic Korean, English, and Japanese mock spreadsheets.
Excel & CSV Merge and Cleanup Workbench
Merge CSV and XLSX sheets by header or position, clean, split, or join selected columns, then download a new file or ZIP.
Whitespace and Duplicate Line Cleaner
Remove unwanted whitespace and blank lines, deduplicate and sort lines, or change letter case in one pass.
Character and Word Counter
Count characters with or without spaces, words, sentences, lines, paragraphs, UTF-8 bytes, and reading time.
Converters
Convert units, number bases, and formatsAudio Converter for MP3, WAV, M4A, Opus and FLAC
Convert audio locally to WAV, MP3, M4A, WebM Opus, or FLAC when supported, then preview and download the result.
Unix Chmod Permission Calculator
Convert owner, group, and other read/write/execute permissions between three-digit octal and rwx notation.
HEX, RGB, HSL, and HSV Color Converter
Synchronize HEX, RGB, HSL, and HSV values from a color picker or text input, including alpha conversion.
Cron Expression Parser
Turn a cron schedule into a readable English description and calculate its next five runs from the browser clock.
JSON, YAML, and CSV Converter
Convert between JSON, YAML, and header-based CSV while seeing source-format syntax errors immediately.
Image Format Converter for HEIC, JPG, PNG, WebP and AVIF
Batch-convert HEIC, HEIF, JPG, JPEG, PNG, WebP, and AVIF images to JPEG, PNG, WebP, or AVIF entirely in your browser.
JSON to TypeScript Converter
Analyze a JSON object or array and generate nested TypeScript interfaces or type aliases.
Number to Korean Words and Won Converter
Convert Arabic numerals into Korean large-number words and a comma-grouped numeric amount.
Binary, Octal, Decimal, and Hex Converter
Enter an integer in any of four bases and calculate the others simultaneously with exact BigInt arithmetic.
Generators
Generate passwords, UUIDs, and sample dataCODE128, EAN-13, UPC-A & CODE39 Barcode Generator
Turn text or numbers into four barcode formats and download the result as a high-resolution PNG or scalable SVG.
Korean & English Fake Data Generator
Choose fields such as names, emails, phone numbers, and addresses to create up to 1,000 rows of mock data as JSON or CSV.
Korean & English Lorem Ipsum Generator
Generate Korean or Latin-style placeholder copy by paragraph, sentence, or word for layout and editorial testing.
Mock Image and Video Generator
Create local mock images and silent test videos with exact dimensions and browser-supported formats.
Random Password Generator
Create up to 20 Web Crypto-based random passwords with configurable length, uppercase, lowercase, numbers, and symbols.
URL & Text QR Code Generator
Create a QR code for a URL or text, customize its size, colors, and error correction, then download PNG or SVG.
Random Name Picker, Dice Roller & Coin Flip
Draw random entries from a list, roll up to 20 polyhedral dice, or flip a coin with recent-result counts.
Encoding & Decoding
Encode, decode, and hash dataBase64 Encoder & Decoder
Encode UTF-8 text and files as Base64, or decode strings and data URIs back into text or files.
String Escape and Unescape Converter
Escape newlines, tabs, and quotes, or restore Unicode and hexadecimal escape sequences to literal characters.
SHA Hash and File Checksum Generator
Calculate SHA-1, SHA-256, SHA-384, and SHA-512 checksums for text or local files at once.
HMAC Message Authentication Code Generator
Calculate a SHA-family HMAC from a message and secret key, then view the result as Hex or Base64.
HTML Entity Encoder & Decoder
Convert HTML-sensitive characters to named, decimal, or hexadecimal entities and decode entities with the browser table.
JSON Formatter and Validator
Format, minify, sort, and validate JSON with clear syntax error locations.
JWT Token Decoder
Read a JWT's Base64URL header and payload as JSON, including standard claims and expiration timing.
Security & Crypto
Encryption, tokens, and key generationAES-256-GCM Text Encryption & Decryption
Derive a key from a password with PBKDF2-SHA-256, encrypt text using AES-256-GCM, and output a portable Base64 string.
Bcrypt Hash Generator & Password Checker
Generate a salted bcrypt hash with cost 4–15 or compare plaintext against an existing bcrypt hash in the browser.
Design & CSS
Colors, gradients, and CSS utilitiesCSS Box Shadow Generator
Build layered CSS box-shadow declarations by adjusting offsets, blur, spread, color, opacity, and inset shadows visually.
HTML, CSS & JavaScript Code Playground
Edit HTML, CSS, and JavaScript, inspect a sandboxed iframe preview and console, then download a standalone HTML file.
WCAG Color Contrast Checker
Calculate the WCAG 2.x contrast ratio between foreground and background HEX colors and test AA or AAA for normal and large text.
Color Picker | Extract Colors from Images and Screen
Convert HEX, RGB, and HSL values, then sample pixels from uploaded or pasted images or from the screen in supported browsers.
CSS Cubic Bezier Easing Generator
Drag two control points to create a cubic-bezier timing curve for CSS animations and transitions, then preview the motion.
Text, Emoji & Image Favicon PNG Generator
Turn text, emoji, or an image into shaped icons and download six PNG sizes for browsers, Apple, Android, and PWAs.
Document & PDF
Create, merge, and split PDF filesDocument Preview | Excel, Word, PPTX and PDF Viewer
Preview Excel, CSV, Word DOCX, PowerPoint PPTX and PDF locally without uploads. Search cells, switch sheets, navigate slides and pages, zoom and use fullscreen.
JPG and PNG to PDF Converter
Arrange multiple images, choose page size, orientation, and margins, and download one ordered PDF.
Quote & Invoice Generator
Create polished quotes and invoices with exact line totals, discounts and tax, then print them. Documents and calculations stay entirely in your browser.
Label & Name Badge Maker
Choose title and subtitle columns from CSV, XLSX, or pasted tables, preview A4 labels, and print them.
Annotate a PDF | Add Text, Pen, and Highlights
Add text notes, freehand pen strokes, and translucent highlight rectangles as new overlays on PDF page previews.
PDF Compare | Review Text Changes by Page
Compare two PDFs locally without uploading. Align inserted or removed pages, highlight text changes, and inspect side-by-side page previews.
Crop PDF Pages | Change Margins and the CropBox
Set the visible rectangle on a preview and change the PDF CropBox for one page or every page without rasterizing content.
Fill Existing PDF Forms | Text, Choices, and Flattening
Find and fill existing AcroForm text, checkbox, radio, and dropdown fields, with optional safe flattening.
Online PDF Merger with Page Reordering
Preview every page from multiple PDFs, remove or reorder pages, and download one merged.pdf file.
Remove PDF Metadata | Clear Author, Dates, and XMP
Create a browser-only copy without common PDF document-info fields or the catalog XMP metadata reference.
PDF Page Organizer | Reorder, Rotate, and Delete
Preview one PDF, reorder its pages, rotate or remove individual pages, and download a newly organized PDF.
Add Page Numbers to PDF | Position and Start Number
Add sequential numbers to a PDF from any page with top or bottom and left, center, or right placement.
Sign a PDF Visually | Draw, Type, or Upload a Mark
Draw a signature shape, type a name, or upload a PNG/JPEG and place the visible mark on a selected PDF page.
Online PDF Splitter and Page Extractor
Select PDF pages by thumbnail or range, extract them into one PDF, or split every page into a ZIP archive.
PDF to JPG or PNG | Export Selected Pages as Images
Choose PDF pages, resolution, and JPEG quality, then save each page as an exact JPG or PNG image.
Extract Text from PDF | Convert Selectable Text to TXT
Extract selectable PDF text page by page, copy it, or save up to five million characters as a plain-text file.
Media & Recording
Audio, video, and image toolsOnline Voice Recorder and Audio Download
Monitor microphone level, record and pause audio, then play it back or save it in a browser-supported format.
Audio Trimmer | Cut Audio and Export WAV
Choose an audio range to the millisecond from browser-decodable input such as MP3, preview it, and download the selected segment as 16-bit PCM WAV.
Solid Background Remover for Transparent PNG
Remove a flat color from logos or text images and export a transparent, white, or custom-color PNG.
Photo EXIF Metadata Viewer
Inspect camera, lens, exposure, capture time, GPS, and raw EXIF values from a photo in your browser.
Online Image Blur for Selected Areas
Drag over multiple rectangular areas, adjust blur strength, and export a PNG at the original image dimensions.
Image Collage Maker and Photo Stitcher
Arrange JPG, PNG, WebP, and AVIF photos vertically, horizontally, or in a grid, then save the collage in your browser.
Image Compressor for JPG, PNG, WebP and AVIF
Batch-compress JPG, PNG, WebP, and AVIF images in your browser with a quality setting or an exact target size in KB.
Image Metadata Remover
Remove EXIF, GPS, XMP, IPTC, and text metadata from JPEG, PNG, and WebP files in your browser without re-encoding pixels.
Image Resizer and Cropper with Exact Pixel Selection
Crop an exact pixel area from a JPG, PNG, WebP, or AVIF image, resize its width and height, and export JPEG, PNG, or WebP.
Online QR Code Scanner for Camera and Images
Decode a QR code from an image or available camera, copy its text, or deliberately open a detected web address.
Online Screen Recorder with Optional Audio
Record a browser-approved screen, window, or tab and optionally add available system audio and microphone input.
On-Device Speech to Text Dictation
Dictate with a supported browser's local speech pack, then copy the transcript or export it as TXT.
Online SRT & VTT Subtitle Editor | Shift and Convert Captions
Open SRT or WebVTT subtitles locally, edit cue text and timing, bulk-shift synchronization, validate issues, and export clean SRT or VTT files.
Video Frame Extractor and Thumbnail Maker
Capture video frames at chosen times or intervals, download selected images as a ZIP, or make a contact sheet. Process locally without uploading your video.
Video Metadata Inspector
Inspect container, codec, bitrate, resolution, audio, subtitles, and recorded location in MP4, MOV, WebM, and other videos locally.
Remove Audio from Video — Mute Video Without Re-encoding
Remove every audio track from a video and download a silent MP4 or WebM. Supported video is copied without re-encoding, locally in your browser, with preview and download.
Online Webcam Video Recorder
Preview and record webcam video with optional microphone audio, then play back and download the result.
Hardware Test
Check input and display hardwareCPS Click Speed Test
Measure clicks per second over 1, 5, or 10 seconds and save your best result in the browser.
Gamepad Test | Check Buttons, Sticks & Drift
Inspect connected controller buttons, axes, sticks, and mapping in real time, then run a three-second neutral-stick observation for standard mappings.
Online Keyboard and Key Code Tester
Test current and previously pressed keys on Mac or Windows layouts and inspect key, code, keyCode, and location.
Online Microphone and Left-Right Speaker Test
Check microphone input and peak level, then play a 440 Hz tone through the left, right, or both speaker channels.
Monitor Dead Pixel and Burn-In Test
Display solid colors, a grayscale gradient, or a grid full-screen to visually inspect pixel defects and uniformity.
Network
Inspect and measure network settingsBrowser Battery and Network Status Checker
View online state and, when browser APIs expose them, battery charge and estimated connection type, speed, and latency.
My Browser, User Agent, and Screen Information
Check inferred browser and OS, User-Agent, screen and viewport, locale, time zone, and exposed hardware details.
HTTP Status Code Search and Reference
Search 34 common HTTP response codes from 100 through 505 by number, English name, or English explanation.