The tools you need.
All in one place.
Fast, private client-side utilities running entirely in your browser.
Work with PDFs, edit images, convert text, and complete your calculations.
Merge PDF
Combine multiple PDF documents into a single file securely in your browser.
Doc1.pdf
Merged.pdf
Resize Image
Resize images to exact pixel dimensions or percentage ratios instantly.
1920×1080
800×450
JSON Formatter
Format, validate, and inspect complex JSON data with real-time syntax checking.
{ "valid": true, "mode": "client" }
Browse by category
View all categories →PDF & Documents
Merge, split, convert, compress, edit
Images & Design
Resize, crop, convert, compress, edit
Audio & Video
Convert, compress, extract, edit
Text Tools
Word counter, case converter, find & replace
Developer Tools
Format, validate, encode, decode, hash
Calculators & Finance
Loan, tax, investment, BMI, discounts
Units & Date / Time
Convert units, time zones, date calculations
QR & Generators
QR codes, passwords, UUID, random data
Featured tools
All tools →PDF Merger & Document Combiner
Combine multiple PDF documents and images into a single cohesive, ordered PDF file.
JSON Formatter, Validator & Prettifier
Format, validate, prettify, and minify JSON payloads with strict error detection.
Image Compressor & Optimizer
Reduce file size with adjustable quality and browser-side processing.
Custom QR Code Generator & Stylist
Create high-resolution vector QR codes for URLs, Wi-Fi networks, and contact vCards.
Live Word & Character Counter
Count words, characters, sentences, paragraphs, and estimate reading time in real time.
Loan Amortization & Mortgage Calculator
Calculate monthly loan payments, interest breakdown, and complete payoff schedules.
All Tools Directory
Developer & Code
JSON Formatter, Validator & Prettifier
Format, validate, prettify, and minify JSON payloads with strict error detection.
Base64 Encoder & Decoder
Encode plain text to Base64 or decode Base64 strings back to UTF-8 instantly.
SQL Query Formatter & Beautifier
Beautify complex SQL queries across PostgreSQL, MySQL, and standard ANSI dialects.
UUID / GUID v4 Bulk Generator
Generate cryptographically random UUID v4 identifiers with custom casing and braces.
RegEx Tester & Real-Time Debugger
Test regular expressions with real-time match highlighting and capture group breakdown.
JWT Token Decoder & Header Inspector
Inspect JSON Web Tokens, parse claims payloads, and verify expiration dates.
Live Markdown Editor & HTML Previewer
Write GitHub-flavored Markdown with synchronized real-time HTML preview and export.
Text & Code Diff Checker
Compare two blocks of text or code side-by-side with character-level difference highlighting.
Cryptographic Hash Generator
Compute SHA-1, SHA-256, and SHA-512 cryptographic hashes via native Web Crypto.
HTML & CSS Code Minifier
Compress HTML and CSS code by stripping comments and redundant whitespace for faster load times.
Lorem Ipsum Dummy Text Generator
Generate customizable placeholder dummy text in paragraphs, sentences, or words.
Cron Expression Explainer & Schedule Translator
Translate 5-part crontab expressions into plain, human-readable English sentences.
JSON to CSV & CSV to JSON Converter
Convert tabular data between JSON array structures and CSV spreadsheets bi-directionally.
JSON to TypeScript Interface Generator
Convert raw JSON payloads into clean, strongly typed TypeScript interface models.
cURL Command to Code Converter
Convert raw cURL shell commands into native Python, JavaScript fetch, and Go code.
SVG to PNG High-Resolution Converter
Rasterize vector SVG files into crisp PNG images at custom scale multipliers.
Number Base & Binary/Unicode Converter
Real-time conversion across Decimal, Binary, Hexadecimal, Octal, ASCII, and Unicode code points.
File & Media Base64 Converter
Convert images, PDFs, audio, and documents into Base64 strings, Data URIs, and CSS background snippets.
CSS Box Shadow & Elevation Generator
Design realistic multi-layered CSS shadows and copy production-ready CSS rules.
CSS Glassmorphism UI Generator
Design frosted-glass UI components with interactive backdrop-filter and border controls.
Tailwind CSS Color Palette Generator
Generate custom 10-step color scales from 50 to 950 and export Tailwind config code.
LLM Token & Cost Estimator (OpenAI, Claude, Gemini & DeepSeek)
Estimate approximate token counts and API inference costs across OpenAI, Claude, Gemini, and DeepSeek models.
Mock Data & Fake JSON Record Generator
Generate realistic dummy records, names, emails, addresses, and UUIDs for API testing.
WCAG Color Contrast Ratio Checker
Evaluate text and background color contrast ratios for WCAG 2.1 AA and AAA compliance.
Meta Tags & Open Graph Previewer
Preview social share cards for Google, Facebook, Twitter/X, and LinkedIn in real time.
HTML Entities Encoder & Decoder
Convert special characters to HTML entities and decode named and numeric entities.
Client-Side AES-256 Text & File Encryptor
Encrypt sensitive messages and confidential files locally with authenticated AES-256-GCM.
RSA Key Pair Generator
Generate client-side PKCS#8 (Private) and SPKI (Public) PEM keys (1024, 2048, 4096-bit) via Web Crypto.
ASCII Art & Figlet Banner Generator
Convert plain typography into retro terminal banners and ASCII art text graphics.
CSS Organic Blob & SVG Shape Generator
Generate unique organic liquid blob shapes and export SVG code and CSS border-radius rules.
CSS Mesh & Aurora Gradient Generator
Design fluid, multi-point organic mesh gradients and export pure CSS styling rules.
Excel to JSON & CSV Spreadsheet Converter
Convert .xlsx and .xls workbooks into clean JSON structures and CSV files offline.
Cron Execution Schedule & Next Runs Calculator
Calculate the next upcoming execution dates and timestamps for any cron expression.
Plain English to Cron Expression Generator
Convert natural language scheduling requests into valid 5-part crontab expressions.
Visual RegEx Pattern Builder
Construct complex regular expressions visually without memorizing arcane syntax rules.
AI Prompt Architect & System Prompt Engineer
Structure high-performance AI prompts with clear persona, context, task, and formatting constraints.
On-Page SEO Meta & Content Analyzer
Audit title tags, meta descriptions, heading hierarchy, and image alt attributes.
Interactive Technical SEO Launch Checklist
Track essential pre-launch technical, content, indexing, and mobile SEO requirements.
.env Configuration Formatter & Alphabetizer
Clean, alphabetize, and deduplicate environment variable key-value configurations.
.env Security & Leak Auditor
Scan environment files for exposed secrets, weak passwords, and insecure default keys.
PII & Sensitive Data Redaction Tool
Automatically mask credit cards, email addresses, phone numbers, and SSNs from logs.
Media & File Tools
Custom QR Code Generator & Stylist
Create high-resolution vector QR codes for URLs, Wi-Fi networks, and contact vCards.
Image Compressor & Optimizer
Reduce file size with adjustable quality and browser-side processing.
Image Resizer & Dimension Scaler
Resize digital photos to exact pixel dimensions with locked aspect ratios.
PDF Merger & Document Combiner
Combine multiple PDF documents and images into a single cohesive, ordered PDF file.
PDF Splitter & Page Extractor
Extract specific page ranges or split large PDF files into individual single-page documents.
PDF Compressor & File Size Reducer
Re-render PDF pages as optimized JPEG images. Best for scanned documents; selectable text and links are not preserved.
Image to PDF Document Converter
Convert multiple JPG, PNG, and WebP images into a clean, multi-page PDF document.
AI Background Remover & Transparent PNG Creator
Remove image backgrounds automatically in your browser using local machine learning.
Universal PDF to Image & Text Converter
Extract high-resolution JPG page images and plain text from PDF documents offline.
Client-Side Optical Character Recognition (OCR)
Extract selectable text from photographed documents, receipts, and scans locally in your browser.
HEX, RGB & HSL Color Picker
Select vibrant colors, explore complementary harmonies, and copy CSS color values.
Universal Color Format Converter
Convert color codes seamlessly across HEX, RGB, HSL, HSV, CMYK, and OKLCH color spaces.
Text to Speech (TTS) Voice Reader
Read text aloud with browser Web Speech synthesis. Local system voices run on-device; optional remote voices connect to speech providers.
Video to Audio (MP4 to MP3/WAV) Converter
Fast client-side demuxing of video tracks; extracts pure audio buffer and encodes it into MP3 or WAV directly in-browser.
Audio Cutter, Fade & Reverse Studio
Visual waveform audio trimmer with precision time markers, linear/exponential fade envelopes, and one-click audio reversal.
Browser Video Trimmer & Cutter
Interactive video player with timeline markers, live scrub preview, and frame-accurate cutting/export.
Unlimited In-Browser Screen & Webcam Recorder
Record your desktop screen, browser tabs, and microphone without watermarks or limits.
Browser Voice & Audio Recorder
Capture microphone audio in high-fidelity 16-bit PCM WAV & WebM with live visualizer waveform and pause/resume.
Batch Photo Watermark Stamper
Apply customized text or logo watermarks to digital photographs with opacity controls.
Multi-Resolution Favicon Package Generator
Generate ready-to-use 16x16, 32x32, and 180x180 favicon icons with HTML link tags.
SVG Vector Optimizer & Minifier
Clean up raw vector SVG code by removing editor metadata, unused groups, and whitespace.
Client-Side Custom Meme Generator
Create viral internet memes with classic Impact typography, custom outlines, and instant download.
Smart Document Scanner & Contrast Filter
Enhance photographed paper documents with perspective correction and high-contrast B&W filters.
YouTube Thumbnail Previewer
Preview and test how your video thumbnail looks across YouTube desktop feed, mobile app, and sidebar layouts.
Photo Blur & Pixelation Privacy Redactor
Selectively blur or pixelate sensitive faces, license plates, and private text in photos.
PDF & Photo Orientation Rotator
Rotate individual PDF pages or digital photos 90, 180, or 270 degrees and save permanently.
PDF Password Encryptor & Security Locker
Encrypt PDF documents with strong AES passwords to prevent unauthorized access and printing.
PDF Page Organizer & Blank Page Inserter
Visually reorder, rotate individual pages, insert custom blank sheets, and remove pages in your browser.
PDF Page Number Stamper & Sequencer
Add sequential page numbering to PDF documents with customizable positions and formats.
Image Color Palette Extractor
Extract dominant color palettes and harmonious accent swatches from any photo.
Video Aspect Ratio & Area Cropper
Visual crop overlay (16:9, 9:16 vertical TikTok/Reels, 1:1 square, 4:5) to re-frame and crop video bounds.
Video Speed Controller
Accelerate or decelerate video playback from 0.25x (slow-motion) up to 4x (timelapse) with pitch correction preservation.
Video Rotate & Flip
Rotate video 90°, 180°, 270° clockwise/counter-clockwise, or mirror horizontal/vertical without sending bytes to a server.
Video Concatenator & Joiner
Sequentially combine matching resolution video clips into a single continuous MP4 file.
Video to Animated GIF & MP3 Converter
Convert video clips into lightweight animated GIFs or extract audio tracks into MP3s.
Audio Track Joiner & Concatenator
Append multiple audio files sequentially into one cohesive audio track with optional crossfade smoothing.
Vocal Pitch & Formant Shifter
Web Audio SoundTouch/PitchShift processor altering pitch semitones (-12 to +12) without changing speed (Robot, Chipmunk, Deep Bass presets).
Audio Silence Detector & Trimmer
Detect quiet regions below a user-selected dB threshold and automatically slice them out to compact podcasts and voiceovers.
Audio BPM & Tempo Tap Detector
Calculate audio track tempo using an offline peak-filter algorithm or tap manually in real-time with sub-millisecond precision.
Online Pro Metronome
Sub-millisecond precision metronome with visual beat pulse, accents, time signatures, and tap tempo.
Left/Right Stereo Channel & Phase Tester
Interactive spatial stereo panner, independent left/right voice prompts, 20Hz-20kHz frequency sweep, and polarity phase verification.
Audio Noise & Low-Frequency Hum Reducer
Filter background hiss, electrical hums, and low-frequency rumble from voice recordings.
ID3 Metadata & Album Art Editor
Inspect and edit Title, Artist, Album, Year, Genre, Track Number, and embedded cover art for MP3 files entirely in-browser.
Client-Side Video Subtitle Editor & SRT Generator
Transcribe and edit timed subtitle captions with real-time video playback and SRT export.
EXIF Photo Metadata Inspector
Read camera settings, exposure data, focal length, timestamps, and GPS coordinates from photos.
Photo Privacy & EXIF Metadata Scrubber
Strip embedded GPS location coordinates, camera serials, and timestamps from images.
Client-Side PDF Redactor & Blackout Tool
Permanently redact and blackout sensitive text, account numbers, and signatures from PDFs.
PDF Metadata Editor & Sanitizer
Read, edit, or completely strip PDF title, author, subject, keywords, and producer tags for privacy.
PDF Image Extractor
Extract all embedded raster and bitmap photos from PDF documents in original resolution without quality loss.
PDF Structure Repair & Sanitize
Rebuild broken cross-reference tables (XREF), re-serialize object streams, and sanitize corrupted PDFs.
Social Media Safe Zone & Grid Splitter
Split panoramic images into 3x1 and 3x3 grids with safe-zone guides for Instagram and TikTok.
Google Fonts Pairing Previewer
Preview and test curated headline and body Google Font typography combinations.
Quick Utilities
Cryptographically Secure Password Generator
Generate high-entropy, cryptographically secure random passwords using browser Web Crypto APIs.
Universal Unit & Measurement Converter
Convert length, mass, volume, and temperature units instantly.
Live Word & Character Counter
Count words, characters, sentences, paragraphs, and estimate reading time in real time.
Universal Percentage Calculator
Calculate percentage increases, discounts, fractional shares, and ratio changes effortlessly.
Universal Text Case Converter
Convert text across UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.
Random Item & Giveaway Name Picker
Select fair, unbiased random winners from lists of names, contest entries, or decisions.
Precision Digital Stopwatch & Lap Timer
Measure elapsed time with millisecond precision, split laps, and clean time exports.
Duplicate Line & Text Entry Remover
Deduplicate text files, sort unique lines alphabetically, and clean email lists.
Advanced Text & Line Organizer
Sort, reverse, randomize, deduplicate, and clean text lines in real-time.
Bill Tip & Fair Split Calculator
Calculate gratuity percentages, round totals, and split restaurant bills evenly across groups.
Text & Code File Merger
Combine multiple .txt, markdown, or code files into a single document with custom separators.
EV vs Gas Fuel Savings & TCO Comparator
Compare total fuel and energy costs between electric vehicles and traditional gas automobiles.
Morse Code Audio Translator & Decoder
Translate English text to international Morse code dots and dashes with synthesized audio playback.
Finance & Investment
Loan Amortization & Mortgage Calculator
Calculate monthly loan payments, interest breakdown, and complete payoff schedules.
Mortgage Amortization Schedule Calculator
Generate comprehensive principal and interest repayment schedules with extra payments.
Salary & Net Paycheck Calculator
Estimate net take-home pay after federal, state, and benefit deductions.
Compound Interest Calculator
Project exponential wealth growth with daily, monthly, or annual compounding.
Inflation & Purchasing Power Calculator
Analyze historical inflation impact and future purchasing power loss on cash.
Real-Time Currency Converter
Convert international currencies instantly with offline caching support.
Credit Card Payoff & Interest Calculator
Create an accelerated payoff plan and calculate total interest accrued on debt.
Crypto Profit & Loss Calculator
Track cryptocurrency trade returns, net ROI, and exchange transaction fees.
CAGR & Investment Return Calculator
Measure compound annual growth rate and annualized portfolio performance.
Rent vs Buy Real Estate Calculator
Compare the 10-year financial outcomes of homeownership versus renting and investing.
FIRE Financial Independence Calculator
Calculate your FIRE number, savings rate, and timeline to early retirement.
Trip Fuel & Mileage Cost Calculator
Calculate gas expenses, total fuel consumption, and per-person travel costs.
Mortgage Refinance Break-Even Calculator
Calculate months to recoup closing costs and evaluate net refinance savings.
Can I Afford This? Purchase & Budget Calculator
Evaluate one-time purchases and recurring subscriptions against income, expenses, and savings buffer.
Real Estate Cap Rate & NOI Calculator
Evaluate commercial and residential investment property capitalization rates.
Debt-to-Income (DTI) Ratio Calculator
Calculate front-end and back-end DTI ratios for mortgage lending qualification.
Asset Depreciation Calculator
Calculate straight-line annual depreciation, depreciable cost basis, and salvage value.
Rule of 72 Investment Doubling Calculator
Estimate the exact years required to double your money at a fixed return rate.
IBAN Validator & BIC Checksum Decoder
Validate International Bank Account Numbers using official MOD-97 algorithms.
Zakat Calculator on Wealth & Gold
Calculate annual Zakat obligations on cash, gold, silver, and investments.
Subscription Audit & Recurring Cost Calculator
Track monthly recurring subscriptions and audit cumulative annual spending leaks.
Currency Exchange Trend & Volatility Viewer
Monitor historical FX rate trends and currency pair fluctuations.
Business Tools
Online PDF Invoice Generator
Generate, customize, and print elegant PDF invoices with itemized taxes and discounts.
Profit Margin & Markup Calculator
Calculate gross profit margin, markup percentage, and optimal selling prices.
Discount & Sale Price Calculator
Calculate final discounted prices, total savings, and applicable sales tax.
VAT & Sales Tax Calculator
Add or exclude Value Added Tax and sales tax from gross or net amounts.
Break-Even Point Calculator
Determine unit sales volume and revenue needed to cover total business costs.
Freelance Hourly Rate Calculator
Determine optimal billable hourly rates based on target income and overhead.
Business Days & Working Day Calculator
Calculate exact working days between dates excluding weekend days (Saturdays and Sundays).
Salary Negotiation Counter-Offer Calculator
Calculate net compensation increases and optimal counter-offer targets.
Freelance Project True Hourly Rate & Profitability
Calculate true take-home hourly rate from project quotes factoring in revisions, meetings, expenses, and taxes.
Severance Pay & Notice Period Calculator
Estimate severance compensation and health benefit runway following layoff.
UTM Campaign URL Builder
Build standardized tracking links with source, medium, campaign, and content tags.
Resume ATS Keyword & Formatting Scanner
Scan your resume against target job descriptions to identify missing keywords for ATS screening.
Payment Gateway Fee & Net Payout Calculator
Compare transaction fees and net payouts across Stripe, PayPal, and Square.
ROAS & Customer Acquisition Cost Calculator
Measure Return on Ad Spend and evaluate digital marketing profitability.
CPM & Media Planning Ad Spend Calculator
Calculate advertising campaign budgets, impressions, clicks, CPC, and CPA from CPM benchmarks.
Website Ad Revenue & RPM Forecaster
Estimate monthly ad earnings from website pageviews and niche RPM benchmarks.
Amazon FBA Profit & Fee Calculator
Calculate referral fees, FBA fulfillment costs, and net e-commerce margins.
SaaS MRR, ARR & Churn Growth Forecaster
Model monthly recurring revenue growth, customer churn rate, and net expansion.
International Meeting & Timezone Planner
Find ideal cross-timezone meeting windows across multiple global cities and teams.
Daily Life & Health
Exact Age & Milestone Birthday Calculator
Calculate your precise chronological age down to years, months, days, hours, and minutes.
Date Duration & Calendar Interval Calculator
Calculate calendar intervals between two dates or add/subtract days from any anchor date.
BMR & Basal Metabolic Rate Calculator
Calculate your daily baseline calorie burn using the Mifflin-St Jeor scientific formula.
TDEE & Daily Calorie Maintenance Calculator
Calculate Total Daily Energy Expenditure and macro splits for cutting, bulking, or maintenance.
Pomodoro Focus Timer & Work Tracker
Boost productivity with structured 25-minute focus intervals and restorative rest breaks.
US Navy Body Fat & Lean Mass Calculator
Estimate body fat percentage and lean muscle mass using tape circumference measurements.
Optimal Bedtime & Wake-Up Sleep Calculator
Plan sleep and wake times in 90-minute REM cycles to wake up refreshed without grogginess.
90-Minute REM Sleep Cycle Calculator
Calculate natural 90-minute sleep cycles to schedule restorative power naps and full night sleep.
Daily Water Intake & Hydration Calculator
Calculate optimal daily fluid requirements based on body weight, climate, and workout intensity.
Pregnancy Due Date & Trimester Calculator
Calculate your estimated baby due date, current gestational week, and trimester milestones.
Intermittent Fasting 16:8 & OMAD Timer
Track fasting and eating windows for 16:8, 18:6, 20:4, and OMAD fasting protocols.
Activity & Exercise Calorie Burn Calculator
Estimate calories burned during running, cycling, swimming, and weightlifting using MET values.
World Clock & Global Timezone Planner
Coordinate international time zones, compare business hours, and account for daylight saving.
International Clothing & Shoe Size Converter
Convert apparel and shoe sizes across US, UK, European, and Japanese measurement standards.
Worldwide Public Holidays Calendar
Browse official national and bank holidays by country and year to plan international work.
Schengen 90/180 Day Visa Calculator
Track rolling short-stay visa allowances across European Schengen member states.
Islamic Prayer Times & Qibla Direction
Calculate daily prayer schedules via Aladhan API and astronomical solar calculation methods.
Commute Cost & Hybrid Work Savings Calculator
Calculate annual fuel, transit, and depreciation expenses from your daily work commute.
