Công cụ trực tuyến miễn phí for PDFs, Hình ảnhs, Văn bản & More
Xử lý PDFs, merge documents, compress images toward target KB limits, calculate SIP & GST, format JSON, and generate QR codes directly in your browser. Quyền riêng tư-focused with zero mandatory account registrations.
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Drag & Drop ANY File here (PDF, JPG, HEIC, WebP, JSON, CSV) — our smart engine will auto-detect its type and suggest relevant tools!
Explore Công cụ trực tuyến miễn phí
Select a category or click any tool to open with browser-side execution
Trình nén PDF
Miễn phí, private browser-based PDF compressor. Reduce PDF file size toward a target KB or MB with zero file server uploads and no watermarks.
JPG to PDF Trình chuyển đổi
Merge multiple JPG, PNG, and WebP images into a single clean PDF document offline in your browser.
PDF to JPG Trình chuyển đổi
Extract every PDF page into high-resolution JPG images directly inside your browser.
PDF Page Extractor
Select, split, and extract specific pages from any PDF document into a new standalone PDF.
PDF Page Deleter
Delete unwanted, blank, or duplicate pages from any PDF document with 1-click visual selection.
PDF Page Rotator
Permanently rotate upside-down or sideways PDF pages 90, 180, or 270 degrees clockwise.
JPG Trình nén ảnh
Nén JPG and JPEG photos toward 20KB, 50KB, 100KB, or custom target sizes with quality tuning.
Hình ảnh Đổi kích thướcr
Đổi kích thước image dimensions in pixels, percentage, or centimeters with aspect ratio locking.
HEIC to JPG Trình chuyển đổi
Chuyển đổi Apple iPhone .HEIC and .HEIF photos into standard high-quality JPG format offline.
WebP to JPG Trình chuyển đổi
Chuyển đổi modern Google .WebP images into universally compatible .JPG format offline.
Favicon Trình tạo
Tạo complete multi-size favicon packages (16x16, 32x32, 180x180, 512x512) and HTML code.
Percentage Máy tính
Calculate percentages, percentage increase/decrease, and percentage differences with PDF summary reports.
Percentage Increase Máy tính
Calculate percentage growth, salary increments, price markups, and relative decline with full formulas.
Discount Máy tính
Calculate final sale prices, discount amounts, and savings with optional sales tax inclusion.
Loan EMI Máy tính
Calculate monthly loan EMI payments, total interest payable, and full yearly amortization schedules.
Mortgage Máy tính
Calculate monthly mortgage payments including principal, interest, property taxes, and home insurance.
ROI Máy tính
Calculate Return on Investment (ROI), total net profit, and investment efficiency percentages.
Compound Interest Máy tính
Calculate compound interest growth, future investment values, and monthly contribution yields.
Salary to Hourly Máy tính
Chuyển đổi annual salary to hourly wage, monthly pay, bi-weekly paychecks, and daily rates.
Sales Tax Máy tính
Calculate total sales tax, final checkout prices, or reverse calculate pre-tax amounts from gross totals.
Margin & Markup Máy tính
Calculate gross profit margin, markup percentage, cost of goods, and selling revenue prices.
Currency Trình chuyển đổi
Chuyển đổi global currencies with indicative exchange rates and instant conversion tables.
Trình định dạng JSON & Validator
Format, validate, beautify, and inspect JSON data with syntax highlighting and tree view.
Trình xác thực JSON
Validate JSON syntax in real-time with line-by-line error messages and structure verification.
CSV to JSON Trình chuyển đổi
Chuyển đổi CSV spreadsheets and Excel data into formatted JSON arrays and nested objects offline.
Mã hóa Base64 & Decoder
Encode UTF-8 strings to Base64 or decode Base64 data into clean text with browser-based local processing.
Hash Trình tạo (SHA-256, MD5)
Tạo cryptographic hashes (SHA-256, SHA-512, SHA-1, MD5) directly inside your browser.
JWT Token Decoder
Decode and inspect JSON Web Tokens (JWT) headers, payloads, and claims offline in your browser.
Word & Đếm ký tự
Analyze text statistics: word count, character count, sentences, paragraphs, and reading time.
Case Trình chuyển đổi
Chuyển đổi text case: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, and snake_case.
Mã QR Trình tạo
Create customizable high-resolution QR codes for websites, Wi-Fi networks, text, and vCards.
Meta Tag & Open Graph Trình tạo
Tạo complete HTML SEO meta tags, OpenGraph social cards, and Twitter Cards with live previews.
Aspect Ratio Máy tính
Calculate missing width or height dimensions for images, videos, and UI mockups based on standard aspect ratios.
Profit Margin Máy tính
Calculate gross profit margin, markup percentage, revenue, and net profit from unit cost and selling price.
Inflation Máy tính
Calculate the erosion of purchasing power and future equivalent value of money based on inflation rates.
Tip & Bill Split Máy tính
Calculate restaurant gratuity (15%, 18%, 20%, 25%) and split the total bill evenly among friends.
Fuel Cost Máy tính
Calculate total gasoline expense, fuel consumption (liters/gallons), and per-passenger travel costs for road trips.
BMI Health Máy tính
Calculate Body Mass Index (BMI) for adults with metric and imperial units, WHO weight categories, and ideal weight targets.
Time Duration Máy tính
Calculate elapsed hours, minutes, and days between two times or calendar dates with work hours tracking.
Universal Unit Trình chuyển đổi
Chuyển đổi between metric and imperial units for length, weight, temperature, area, volume, speed, and digital storage.
Length & Distance Trình chuyển đổi
Chuyển đổi length and distance between centimeters, meters, kilometers, inches, feet, yards, and miles.
Weight & Mass Trình chuyển đổi
Chuyển đổi weight and mass between kilograms, grams, milligrams, pounds, ounces, stone, and metric tons.
Temperature Trình chuyển đổi
Chuyển đổi temperature scales between Celsius (°C), Fahrenheit (°F), and Kelvin (K) with instant formula walkthrough.
JSON to CSV Trình chuyển đổi
Chuyển đổi JSON arrays and nested objects into tabular CSV spreadsheet files for Excel and Google Sheets.
UUID / GUID Trình tạo
Tạo cryptographically random RFC 4122 Version 4 UUIDs and GUIDs individually or in bulk.
Văn bản & Code Diff Trình kiểm tra
Compare two text snippets or code files side-by-side to highlight additions, deletions, and character modifications.
Regular Expression Tester
Test and debug JavaScript regular expressions in real time with syntax highlighting and match capture groups.
Bộ chọn màu & Palette Trình tạo
Inspect, convert, and harmonize colors across HEX, RGB, HSL, and CMYK formats with WCAG contrast checker.
Lorem Ipsum Trình tạo
Tạo customizable placeholder Latin dummy text by paragraphs, sentences, words, or lists with HTML tags.
Duplicate Line Remover
Remove duplicate lines, trim whitespace, remove empty rows, and sort lists alphabetically in your browser.
HTML Minifier & Beautifier
Minify HTML markup by removing whitespace, comments, and line breaks to accelerate web page loading.
CSS Minifier
Minify CSS code by stripping whitespace, comments, and redundant semicolons to boost page speed.
JavaScript Minifier
Minify and compress JavaScript source code in your browser to reduce script payload sizes.
Mã QR Scanner & Trình đọc
Scan and decode QR codes instantly using your device webcam or by uploading image files.
Robots.txt Trình tạo
Tạo compliant robots.txt directives for Googlebot, Bingbot, and AI crawlers with custom crawl rules.
Open Graph Meta Tag Trình tạo
Tạo rich Open Graph and Twitter Card social meta tags with live social preview card.
Keyword Density Analyzer
Analyze word frequency, 1-word, 2-word, and 3-word keyword density percentages to prevent keyword stuffing.
Đếm ký tự
Count characters with and without spaces, words, sentences, and paragraphs for social media character limits.
Secure Mật khẩu Trình tạo
Tạo strong, high-entropy cryptographic passwords with custom length, symbols, and numbers locally using Web Crypto API.
Văn bản Summarizer
Summarize long articles, essays, and reports into concise key takeaways using browser-based text extraction.
Markdown to HTML Trình chuyển đổi
Chuyển đổi GitHub Flavored Markdown (GFM) into clean HTML markup with live visual preview and 1-click copy.
Văn bản & String Reverser
Reverse text character-by-character, word-by-word, or line-by-line with instant 1-click transformation.
Random Number Trình tạo
Tạo random numbers, rolls, and sequences between any min and max values using Web Crypto API.
My IP Address Trình kiểm tra
Check your public IPv4/IPv6 address, ISP, location, and browser connection details instantly.
Number Base Trình chuyển đổi
Chuyển đổi numbers across Binary (Base 2), Octal (Base 8), Decimal (Base 10), and Hexadecimal (Base 16).
HTML Entity Encoder & Decoder
Encode special characters into HTML entities and decode HTML entities back to raw text.
URL Encoder & Decoder
Encode strings into percent-encoded URL formats (encodeURIComponent) and decode percent-encoded URLs.
CSV Delimiter Trình chuyển đổi
Change delimiters in CSV and spreadsheet files between Comma (,), Semicolon (;), Tab (\t), and Pipe (|).
PDF Merge & Combine
Combine multiple PDF documents into a single organized file with drag & drop page reordering and zero server upload.
SIP Investment Máy tính
Calculate maturity wealth, invested capital, and compounding returns for monthly mutual fund SIPs with visual charts.
GST Tax Máy tính
Calculate GST amounts (3%, 5%, 12%, 18%, 28%) with forward/reverse calculation and CGST/SGST breakdown.
Hình ảnh to Văn bản (OCR)
Extract text from photos, scanned receipts, book pages, and documents locally in your browser with zero server uploads.
PDF Mật khẩu Protect
Encrypt PDF documents with strong AES passwords directly in your browser with zero server uploads.
PDF Page Organizer
Visually reorder, rotate, and delete PDF pages in an interactive grid with zero server uploads.
AI Background Remover
Remove image backgrounds and create transparent PNG cutouts locally in your browser with zero server uploads.
Mã vạch & QR Studio
Tạo Code 128 retail barcodes and 2D QR matrix codes with custom SKUs and high-resolution PNG export.
AI Văn bản to Speech
Chuyển đổi text to natural speech audio in your browser using neural voice synthesis with pitch and rate modulation.
AI Chat Assistant
Chat with an in-browser AI assistant for coding solutions, document summaries, and calculations with zero server logging.
AI Hình ảnh & DALL-E Studio
Tạo ultra-detailed prompts for Midjourney v6, DALL-E 3, and Stable Diffusion with lighting and camera controls.
AI Content & Headline Writer
Tạo high-CTR headlines, viral video hooks, blog outlines, and cold email copy in seconds.
AI Grammar & Readability Trình kiểm tra
Analyze spelling, grammar errors, wordiness, and Flesch readability grade in your browser with zero server uploads.
AI Code & SQL Trình tạo
Tạo clean TypeScript, JavaScript, Python, SQL, and HTML/CSS snippets for algorithms and web tasks.
AI Văn bản Humanizer
Humanize ChatGPT and AI-generated text, remove robotic clichés, and enhance natural sentence flow with 100% in-browser privacy.
AI Resume Bullet Builder
Tạo high-impact resume bullets using the Google XYZ formula with quantifiable metrics and action verbs.
AI YouTube Viral Script Studio
Tạo high-retention YouTube scripts, 3-second opening hooks, and high-CTR thumbnail prompts for Shorts and full tutorials.
AI Viral Hashtag Studio
Tạo targeted hashtag clusters and engaging captions for Instagram, TikTok, Twitter, and LinkedIn with zero server uploads.
AI Email Subject Line Tester
Tạo high-converting email subject lines with simulated open rate potential and spam trigger avoidance.
AI Regex & Query Synthesizer
Tạo regular expressions from plain English descriptions with live interactive test string matching in your browser.
Passport & Visa Photo Trình tạo
Crop and align headshots for US, Indian, Schengen, and UK passport requirements with printable 6-photo sheets.
Digital Signature Trình tạo
Draw digital signatures or generate stylish cursive calligraphy with transparent PNG download for PDFs and contracts.
Văn bản to PDF Trình chuyển đổi
Chuyển đổi text notes, essays, and contracts into formatted vector PDF documents with custom margins and font controls.
Hình ảnh Color Inverter & Grayscale
Invert image colors into dark negatives, convert photos to black and white grayscale, or apply vintage sepia.
PDF to Excel / CSV Extractor
Extract tables and tabular text from PDF documents into structured Excel CSV spreadsheets locally in your browser.
AI Paraphraser & Sentence Rewriter
Paraphrase essays, rewrite articles, and enhance sentence fluency in 4 writing styles with zero server uploads.
AI Social Bio Trình tạo
Tạo high-converting, aesthetic bios for Instagram, Twitter (𝕏), and LinkedIn with zero server uploads.
AI Cold Email & Pitch Trình tạo
Tạo personalized B2B cold email templates and sales pitches using AIDA and PAS frameworks.
AI Meeting Notes Summarizer
Extract executive summaries, key decisions, and assigned action item checklists from meeting transcripts.
AI Meta Description Trình tạo
Tạo high-CTR Google meta descriptions (150-160 chars) with live desktop & mobile SERP snippet preview.
Loan Prepayment Máy tính
Calculate total interest saved and tenure reduction when making extra monthly or yearly lump sum loan prepayments.
JPG & PNG to WebP Trình chuyển đổi
Chuyển đổi JPG, PNG, and GIF images to modern Next-Gen WebP format with custom compression quality and 0 server uploads.
Scanned PDF OCR Văn bản Extractor
Extract editable text from scanned PDF documents and books using WebAssembly Optical Character Recognition (OCR) with 0 server uploads.
Retirement & FIRE Corpus Máy tính
Calculate target retirement nest egg and required monthly SIP investment adjusted for inflation and life expectancy.
Circular Hình ảnh & Avatar Cropper
Crop photos into perfect circular avatars with custom stroke borders and transparent PNG backgrounds for WhatsApp and LinkedIn.
AI Job Cover Letter Trình tạo
Tạo compelling, tailored 3-paragraph job application cover letters customized for any job title, company, and skill set.
JSON to CSV & CSV to JSON Trình chuyển đổi
Chuyển đổi JSON arrays to tabular CSV spreadsheets and CSV files back to JSON with syntax validation and instant download.
Trang chủ Loan + SIP Recovery Máy tính
Calculate how a small monthly SIP investment completely covers and recovers 100% of your home loan bank interest.
Why Users Choose NexVaani
Engineered with modern browser technologies for speed, privacy, and usability.
🔒 Quyền riêng tư-Focused Architecture
Your files are processed locally in your browser and are not uploaded to NexVaani's file-processing servers.
⚡ Fast Browser-Based Xử lýing
Executes directly on your device utilizing client-side computing capabilities without server queue delays.
🔗 Clean Outputs & Miễn phí Access
Clean exports without watermarks, mandatory subscriptions, or hidden charges.
Frequently Asked Questions
Learn more about how NexVaani protects your privacy and delivers fast browser tools.
Popular Tasks
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