NEOKYRU
Everyday Problems,
Solved Instantly.
Fast, private, and 100% free online tools. Merge PDFs, compress photos, format code, and calculate finances directly in your browser with zero file uploads.
Most Popular Tools
PDF Merger
Merge multiple PDF documents into a single organized PDF file
PDF Compressor
Reduce PDF file size online while maintaining maximum visual quality
Image Compressor
Compress JPG, PNG, and WebP images locally with custom quality control
Image to PDF Converter
Convert JPG, PNG, and WebP images into a single formatted PDF document
Universal PDF Converter Suite
Convert PDF to Word, Excel, JPG, and convert documents to PDF locally
Image Resizer
Resize image dimensions by pixels or percentage with aspect ratio lock
Custom QR Code Generator
Create custom QR codes for URLs, Wi-Fi, text, and vCards with instant SVG/PNG download
Video Compressor
Compress MP4, WebM, and MOV videos locally with custom bitrate and resolution scaling
Internet Speed Test
Test real-time internet download speed, latency ping (ms), and network jitter directly in-browser
JSON Formatter, Validator & Minifier
Format, validate, beautify, and minify JSON with real-time error detection
Percentage & Margin Calculator
Calculate percentages, percentage change, profit margins, and markups instantly
Age Calculator
Calculate exact chronological age in years, months, days, hours, and minutes with life milestones
Explore Tool Suites
Image & Photo Tools
Compress, resize, convert, crop, rotate, and inspect images locally in browser with zero cloud upload.
PDF & Document Tools
Merge, split, reorder, rotate, convert images to PDF, encrypt, and inspect PDF metadata with client-side privacy.
Video Tools
Compress, convert, trim, crop, resize, rotate, extract frames and audio, and generate GIFs locally in browser with zero server uploads.
Audio Tools
Cut, trim, merge, convert, compress, normalize, record, and visualize audio files 100% in-browser with zero server uploads.
Document & Spreadsheet Tools
CSV viewers, Markdown previewers, text-to-PDF, text mergers, splitters, and document formatting utilities.
Text & Writing Tools
Word counters, character counters, readability checkers, case converters, line sorters, text cleaners, diff tools, extractors, and markdown utilities 100% in-browser.
Calculators & Math Tools
Free online financial, mortgage, loan, health, math, and everyday calculators with 100% in-browser precision and zero server tracking.
Unit & Currency Converters
Universal unit converter, real-time currency rates, arbitrary number base conversion, Roman numerals, time, and data storage converters 100% in-browser.
Developer & Coding Tools
JSON formatters, Base64, URL encode/decode, JWT inspectors, hashes, CSS generators, and developer utilities.
Security & Privacy Tools
Free client-side password generators, strength analyzers, cryptographic hashes (SHA-256, SHA-512, MD5), AES encryption, file checksums, and metadata strippers with zero server uploads.
Web & Internet Tools
Free online URL utilities, IP subnet calculators, DNS/WHOIS lookups, HTTP header analyzers, user agent parsers, QR codes, and barcodes.
Everyday Utilities
The "I just need a tiny tool" suite: Global salary & payroll calculators, stopwatch, timers, unit converters, device diagnostics, health tools, random pickers, and quick generators.
Generators & Random Tools
Cryptographically secure random number & string generators, passwords, usernames, rosters, decision wheels, polyhedral dice, UUIDs, gradients, and QR/barcodes.
Social Media & Creator Tools
Free online social media image resizers, YouTube thumbnail & banner creators, video aspect ratio helpers, caption formatters, hashtag generators, and SRT/VTT subtitle tools.
Emoji & Symbols
Instant click-to-copy emoji library, special unicode symbols, kaomoji, math, and currency signs.
Files & Archives
Compress, split, merge, hash, inspect metadata, sanitize, and archive files (ZIP, TAR, GZIP) with 100% in-browser privacy.
Media & Entertainment Tools
Free browser-based media utilities for subtitle conversion (SRT, VTT), time shifting, subtitle merging, video and audio bitrate calculation, frame rate conversion, media duration, aspect ratios, and media file metadata analysis.
Math & Education Tools
Free online math calculators for algebra, equations, fractions, geometry, trigonometry, and number systems.
SEO & Webmaster Tools
Free online SEO utilities, meta tag generators, JSON-LD schema builders, SERP simulators, keyword density analyzers, sitemaps, and .htaccess tools.
Design & Color Tools
Free online color pickers, HEX/RGB/HSL/CMYK converters, WCAG 2.1 contrast checkers, color blindness simulators, palette generators, and CSS/SVG studios 100% in-browser.
Data & Spreadsheet Tools
Free online CSV viewers, editors, converters to JSON/Excel, data cleaners, deduplicators, column tools, JSON/XML tree viewers, and interactive SVG chart makers.
Finance & Business Tools
Free financial calculators, business planning tools, tax estimators, invoice generators, and currency converters. 100% private and client-side.
Date, Time & Calendar Tools
Free online age calculators, date difference counters, business workday schedulers, world clocks, live timers, perpetual calendars, and Unix timestamps 100% in-browser.
OCR & Text Extraction
Extract text, tables, URLs, emails, and phone numbers from images, PDFs, screenshots, and scanned documents 100% in-browser.
AI Utilities & Natural Language Tools
100% client-side AI text summarizers, rewriters, paraphrasers, grammar checkers, sentiment analyzers, speech synthesis, and document QA with zero server transmission.
Science & Research Tools
100% client-side physics, chemistry, astronomy, radiation, molecular weight, pH, half-life, and scientific calculators with zero server data transfer.
Home, Construction & Property Tools
Free professional calculators for home renovation, building materials, room dimensions, land area, and property finance 100% in-browser.
Automotive & Vehicle Tools
Free professional automotive calculators for fuel economy, trip costs, engine power, gear ratios, tire sizing, EV charging, and car financing 100% in-browser.
Travel & Trip Planning Tools
Free smart tools for vacation budgeting, flight times, packing checklists, jet lag recovery, multi-currency conversions, and travel itineraries 100% in-browser.
Geography & Geodesy Tools
Free online tools for GPS coordinate conversion, great circle distances, compass bearings, elevation physics, time zones, and country geographic utilities.
Health & Fitness Tools
Free informational calculators for BMI, body fat percentage, BMR, TDEE, calories, macros, hydration, running pace, cycling speed, heart rate zones, and 1RM strength.
Food & Cooking Tools
Free culinary calculators for recipe scaling, serving adjustments, cups to grams ingredient conversions, kitchen timers, oven temperatures, nutrition, and recipe costing.
Shopping & Everyday Life Tools
Free smart shopping calculators for discounts, sale prices, restaurant tipping, bill splitting, unit pricing, price per weight, sales tax, shopping lists, and quick decisions.
Photography Tools
Free smart photography calculators for depth of field, hyperfocal distance, 35mm focal length equivalents, shutter speeds, exposure value, print sizes, DPI/PPI, and camera EXIF inspection.
Gaming Tools
Free smart gaming calculators for mouse sensitivity conversion, eDPI benchmarks, custom resolutions, aspect ratios, field of view (FOV), FPS frame times, PC bottlenecks, XP progression, and RPG combat stats.
Productivity & Focus Tools
Free browser-based productivity utilities for Pomodoro focus timers, habit tracking, task checklists, Eisenhower priority matrices, time blocking, timesheet hours, and international team meeting scheduling.
Business & Office Tools
Free client-side business utilities for generating invoices, receipts, quotations, purchase orders, formal letters, email signatures, meeting agendas, minutes, and tracking expenses.
E-commerce & Online Retail Tools
Free smart e-commerce calculators for net profit, profit margins, marketplace referral fees, dimensional shipping weight, landed product costs, SKU matrices, and barcode tools.
QR, Barcode & Identifiers
Free client-side utilities for generating customizable QR codes, scanning barcodes via webcam, EAN/UPC retail codes, ISBN book tools, and UUID/GUID generators.
Career & Job Search Tools
Free client-side career tools for salary and hourly wage conversion, overtime pay, take-home tax estimates, work hours timesheet tracking, notice period and experience calculation, ATS resume audits, and professional emails.
Agriculture & Environmental Tools
Free client-side agricultural and environmental calculators for land area conversion, irrigation flow, crop water requirements (ETc), seed rate, fertilizer NPK dosing, harvest yield, solar energy, carbon footprint, and farm energy audits.
Astronomy & Space Tools
100% client-side astrophysics, orbital mechanics, telescope optics, cosmic distance converters, Kepler laws, escape velocity, and relativistic travel calculators with zero server data transfer.
Engineering & Technical Tools
100% client-side electrical, mechanical, structural, civil, and chemical engineering calculators: Ohm's law, beam deflection, pipe flow, gear trains, wire sizing, and thermal transfer.
Language & Linguistics Tools
100% client-side language and linguistics tools: word counter, syllable analysis, reading & speaking time, case conversion, phonetic transcription, transliteration, Morse code, Braille, Unicode symbols, and Text-to-Speech.
Accessibility Tools
Audit and optimize digital accessibility with WCAG 2.1/2.2 AA & AAA contrast checkers, color blindness simulators, typography calculators, alt text generators, and ARIA validators.
Email Tools
Compose, format, validate, and preview emails with RFC 5322 validators, bulk scrapers, HTML signature designers, and header analyzers.
Printing & Paper Tools
Calculate DPI/PPI print resolution, convert ISO 216 paper sizes (A, B, C series), generate passport and ID photo printable sheets, and compute bleed, margins, and PDF imposition layouts 100% in-browser.
URL & Link Tools
Encode, decode, parse, sanitize, and construct high-performance web, marketing, and mobile links. Includes RFC 3986 percent encoders, GA4 UTM campaign builders, deep link generators, and click-to-call link makers.
Reference & Lookup Tools
Comprehensive technical references, standard lookups, and developer cheatsheets: MIME types, HTTP status codes & methods, HTML entities, Unicode, emojis, ISO country/currency/language codes, time zones, CSS units, and measurement conversions.
Research & Data Analysis Tools
Publication-grade statistical analysis, hypothesis testing, regression models, probability distributions, data cleaning, and interactive SVG scientific charts — 100% private in-browser client-side computation.
Real Estate & Property Investment Tools
Calculate mortgage PITI payments, amortization schedules, rent vs buy feasibility, DTI mortgage affordability, fix-and-flip ROI, rental yields, cap rates, price per sq ft, and land acreage conversions 100% in-browser.
Legal & Administrative Utilities
Calculate procedural court deadlines, notice periods, contract expiration dates, case timelines, document checklists, agreement clause formatting, and signature counterpart pages 100% in-browser.
Vedic Astrology & Cosmic Tools
Free client-side Vedic astrology, Lo Shu 3x3 Grid, Chaldean & Pythagorean numerology, and planetary calculators with 100% in-browser privacy.