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Featured
WhatsApp Chat Analyzer
Stats, word cloud, response times — 100% offline
Featured
Image Steganography
Hide secrets in photos with AES-256
PDF Merge
Combine PDFs instantly, no upload
JWT Debugger
Decode & verify tokens locally
EMI Calculator
Loan EMI, interest & schedule
Password Checker
Real crack-time estimates
Resume Builder
ATS-friendly CV in minutes
All PDF Tools
14 tools — merge, split, compress, redact
- Private by designYour files never leave your device
- Blazing fastNo server round-trips, no waiting
- Zero signupOpen a tool and start instantly
- Free foreverNo paywalls, no watermarks
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Browse by category
Jump straight to the tools you need — calculators, PDF, image, developer, and more.
Why ToolAdda
Built for real work
Premium-quality tools that respect your privacy and your time.
Phone, tablet, or desktop — responsive layouts and touch-friendly controls.
Calculators, PDF, image, text, developer, security, and games in one place.
New tools added regularly — check Recently added for the latest.
What's new
Recently added
Fresh tools built for productivity, planning, and modern workflows.
PPK to PEM Converter
Convert PuTTY .ppk keys (v2/v3, RSA/ECDSA/Ed25519) to OpenSSH PEM — fingerprints, integrity check, zero uploads.
Flatten PDF
Lock in filled form fields (text stays selectable) or flatten to images (fully uneditable) — both explained plainly, with a verification report.
Epoch / Unix Timestamp Converter
Auto-detects seconds/ms/µs/ns, converts to any timezone with real DST handling, and batch-converts whole logs.
Scientific Calculator
Real math engine with an editable tape history, unit and base conversion, graphing, equation solver, matrices, and statistics.
Online Notepad
Auto-saving Markdown notepad with live preview, multi-note sidebar, and export to PDF/DOCX. No login, works offline.
Image Steganography
Hide a secret text or file inside an image with AES-256 encryption, then extract it back. Includes a bit-plane/histogram analysis tab.
WhatsApp Chat Analyzer
Upload exported .txt chat — message stats, activity hours, emojis, word cloud & response times. 100% offline.
Image Background Remover
Remove or change a photo's background — transparent, solid color, or custom image.
GPA / CGPA Calculator
Calculate SGPA, cumulative CGPA, convert CGPA to percentage, and find your target GPA.
Random Name Picker
Spin a wheel to pick a fair random winner, with raffle mode, weighted odds, and history.
Cron Expression Generator
Build crontab schedules visually, read them in plain English, and preview the next run times.
SVG to PNG / JPG / WebP
Convert SVG to PNG, JPG or WebP with custom size, transparency and batch ZIP download.
URL Encoder / Decoder
Encode & decode URLs, URI components and query parameters — with a query string builder and parser.
Regex Tester
Test regular expressions with live highlighting, capture groups, match details and replace mode.
Hash Generator MD5/SHA
Generate & compare MD5, SHA-1, SHA-256 and SHA-512 hashes from text or files — nothing is uploaded.
JWT Debugger
Decode & verify JSON Web Tokens — inspect header, payload, claims, expiry, and signature.
UTM Builder
Build trackable campaign URLs with UTM parameters for Google Analytics — live preview & QR.
URL Shortener
Shorten long links into clean, shareable URLs with a custom alias and instant QR code.
Fancy Font Generator
Turn plain text into 40+ stylish Unicode fonts for Instagram bios, WhatsApp, and more.
Compress Image to Exact KB
Shrink a photo to a precise target size — perfect for SSC, UPSC, and other government forms.
Passport Size Photo Maker
Crop and export passport, visa, PAN, and exam photos to exact specs — no watermark.
Signature Resizer
Resize a signature into an exact KB range for SSC, IBPS, UPSC, PAN, banking & university forms.
Text to Handwriting Converter
Turn typed text into realistic, natural-looking handwriting on ruled or old paper.
Online Teleprompter
Smooth, keyboard-controlled scrolling teleprompter — no download, works in your browser.
Land Area Unit Converter
Convert bigha, katha, guntha, kanal, and more using each state's own conversion factors.
Worksheet Generator
Generate printable maths and handwriting practice worksheets with answer keys.
Rent Receipt Generator
Generate rent receipts for HRA claims with a built-in exemption calculator.
Poster Printer
Split an image across multiple A4/A3 pages to print a large wall poster.
Emoji & Kaomoji Picker
Search and one-click copy emoji, kaomoji, text symbols, and decorations.
PDF to Images Converter
Convert PDF pages to PNG, JPG, or WebP at any DPI — no upload required.
robots.txt Generator & Tester
Visually build a robots.txt and test URLs against it with real matching logic.
Add Watermark to PDF
Add a text or image watermark to your PDF, tiled or single, keeping text selectable.
Compare Two PDFs
Visual and text diff between two PDFs, with smart page alignment.
Redact PDF
Permanently remove sensitive text from a PDF — manual, search, and OCR redaction.
Password Strength Checker
Real crack-time estimates via zxcvbn. Zero tracking, zero uploads, not even analytics.
Tool finder
Search tools instantly
Find calculators, PDF helpers, image utilities, and developer tools with blazing-fast search.
3D Molecular Structure Viewer
Rotate, zoom and inspect ball-and-stick models of 17 molecules in real 3D — built on plain HTML5 Canvas.
Hash Generator MD5/SHA
Generate & compare MD5, SHA-1, SHA-256 and SHA-512 hashes from text or files — nothing is uploaded.
Regex Tester
Test regular expressions with live highlighting, capture groups, match details and replace mode.
SVG to PNG / JPG / WebP
Convert SVG to PNG, JPG or WebP with custom size, transparency and batch ZIP download.
URL Encoder / Decoder
Encode & decode URLs, URI components and query parameters — with a query string builder and parser.
Interactive Periodic Table
Explore all 118 elements — atomic mass, electron configuration, electronegativity, filters and element comparison.
Electron Configuration Builder
Build and visualize electron configurations — orbital boxes, shell distribution, animated filling for all 118 elements.
PPK to PEM Converter
Convert PuTTY .ppk keys (v2/v3, RSA/ECDSA/Ed25519) to OpenSSH PEM — fingerprints, integrity check, zero uploads.
Internet Speed Test
Check download & upload speed, ping and jitter with a live gauge.
GPA / CGPA Calculator
Calculate SGPA, cumulative CGPA, convert CGPA to percentage, and find your target GPA.
Age Calculator
Calculate age in years, months, and days instantly.
Premium Calculator
Fast, real-time calculations with operator precedence, history, and keyboard input.
EMI Calculator
Estimate monthly loan repayments, interest, and total payment.
BMI Calculator
Check your BMI, healthy weight range, and category using metric or imperial units.
Percentage Calculator
Thirteen percentage tools in one — change, difference, discounts, markup and tax, each with the formula and steps.
Loan Calculator
EMI, total interest and the full cost of a loan, with an amortization schedule and prepayment savings.
Home Loan Calculator
Calculate home loan EMI, total interest, loan amount, and full amortization schedule.
Car Loan Calculator
Estimate car loan EMI, total interest, and month-wise repayment for your vehicle purchase.
FD Calculator
Calculate your fixed deposit maturity amount, total interest, and compound growth offline.
PPF Calculator
Estimate Public Provident Fund maturity, total interest, and year-wise growth with live results.
Manual Tax Calculator
Estimate income tax for a chosen financial year and compare the old and new regimes with a full slab breakdown.
Password Generator
Create secure random passwords with custom length and character rules entirely offline.
SSL Checker
Analyze a website’s SSL/TLS grade, certificate issuer, expiration, and endpoint security quickly.
SSH Key Generator
Generate Ed25519, RSA, or ECDSA SSH key pairs securely in your browser — nothing uploaded.
UUID Generator
Create Version 1, Version 4, Version 7, and Nil/Empty UUIDs instantly in your browser.
Cron Expression Generator
Build crontab schedules visually, read them in plain English, and preview the next run times.
Random Name Picker
Spin a wheel to pick a fair random winner, with raffle mode, weighted odds, and history.
Sitemap Generator
Build a valid XML sitemap from your website URLs with priority, changefreq, and lastmod settings.
robots.txt Generator & Tester
Visually build a robots.txt with presets, then test any URL against it with real Google-spec matching logic.
.htaccess Generator
Visually build Apache redirects, security headers, caching, and CORS — WordPress/Laravel/SPA presets included.
YAML to XML Converter
Convert YAML to well-formed XML instantly — nested objects, arrays, anchors, attributes, and a live tree view.
Favicon Generator
Create favicon.ico, Apple touch icons, Android maskable icons, web manifest, and HTML head snippet from image, text, or emoji.
SVG Optimizer
Minify SVG with real SVGO, analyze & validate structure, compare before/after, and convert to PNG/JPG/WebP with React/Vue export.
Salary Slip Generator
India-focused payslip PDF with CTC split, PF/LOP helpers, bulk CSV, 4 templates, and net pay in words.
Resume Builder
ATS-friendly resume maker with live preview, real-text PDF/DOCX/TXT export, writing help, and import from PDF or Word — no signup.
ATS Resume Checker
Upload PDF or DOCX — see what ATS reads, keyword match vs job description, structure issues, and prioritized fixes. 100% private.
Paper Generator
Print-perfect vector PDFs: graph, dot grid, ruled, four-line, Hindi, music, hex, Cornell notes, and more at true mm scale.
Bingo Card Generator
Generate up to 500 unique bingo cards with themes, seeded shuffle, caller tools, winner verification, and bulk PDF/ZIP.
OMR Sheet Generator
Create printable OMR bubble answer sheets with roll number grid, NEET/JEE presets, answer key page, and vector PDF export.
Custom QR Code Maker
Create stylish QR codes with logo support, custom colors, and instant PNG download.
CSS to Tailwind Converter
Convert CSS to optimized Tailwind utility classes instantly — flexbox, grid, colors, responsive & dark mode.
JSON Formatter
Format, validate, sort, and minify JSON directly in your browser.
JSON to YAML
Convert JSON data into YAML quickly for configs, APIs, and developer workflows.
JSON to TypeScript
Generate TypeScript interfaces, types, classes, and enums from JSON instantly, with nested support.
Markdown to Notion
Convert Markdown into Notion API-compatible Block JSON with nested lists, tables, and callouts.
CSV to JSON Converter
Convert CSV files into clean JSON instantly.
JSON to CSV Converter
Convert JSON data into clean CSV instantly.
XML to JSON Converter
Convert XML into clean JSON instantly, with attribute handling and pretty output.
JSON to XML Converter
Convert JSON into valid XML instantly, with browser-based parsing and pretty-print output.
WhatsApp Chat Analyzer
Upload WhatsApp exported .txt — message counts, activity charts, emojis, word cloud & response times. 100% offline.
Typing Speed Test
Measure your typing speed, accuracy, and words per minute with a polished online test.
Text Sorter
Sort text lines alphabetically, by length, or randomly—instantly in your browser.
Case Converter
Convert text between uppercase, lowercase, title case, and sentence case.
SIP Calculator
Estimate SIP growth with step-up modelling, goal-based planning and a year-by-year projection.
RD Calculator
Estimate recurring deposit maturity value, total contributions, and interest earned.
GST Calculator
Add or remove GST at 5%, 12%, 18%, 28% or a custom rate, with an exact CGST, SGST and IGST breakdown.
Unit Converter
Convert length, weight, temperature, volume, area, and speed with live metric and imperial results.
Land Area Unit Converter
Convert bigha, katha, guntha, kanal, marla, and more using each Indian state's own conversion factors.
Rent Receipt Generator
Generate rent receipts for HRA claims with amount in words and a built-in exemption calculator.
PDF Merge
Merge multiple PDF documents directly in your browser without uploading anything.
PDF Compress
Reduce PDF file size locally in your browser without uploading the document.
PDF Split
Split a PDF into individual pages or custom page ranges right in your browser.
PDF Extract
Extract exact pages from a PDF and download the result instantly.
PDF Rotate
Rotate PDF pages in the browser with selected or full-document options.
PDF Password Remover
Unlock a password-protected PDF locally and download the decrypted copy.
PDF Password Protector
Protect a PDF with a password locally and download the secured copy.
Images to PDF
Combine several images into a single PDF document directly in your browser.
HTML to PDF
Paste HTML markup and generate a PDF instantly without uploading your content.
PDF to Images Converter
Convert PDF pages to PNG, JPG, or WebP at any DPI, with page selection and no upload.
Add Watermark to PDF
Add a text or image watermark, tiled or single, with full position and opacity control.
Compare Two PDFs
Visual pixel diff and word-level text diff between two PDFs, with smart page alignment.
Redact PDF
Permanently remove sensitive text from a PDF — manual, search, pattern, and OCR redaction.
Password Strength Checker
Real crack-time estimates via zxcvbn under multiple attack scenarios — plus a generator, passphrase tool, and bulk checker. No analytics, ever.
Image Steganography
Hide a secret text or file inside an image with AES-256 password encryption, then extract it back. Includes a bit-plane/histogram analysis tab.
Online Notepad
Auto-saving Markdown notepad with live preview, multi-note sidebar with tags and trash, and export to Markdown/HTML/PDF/DOCX. No login, works fully offline.
Scientific Calculator
A real math engine (no eval!) with an editable running-history tape, unit and base conversion, graphing, equation solver, matrix calculator, and statistics. Works offline.
Epoch / Unix Timestamp Converter
Auto-detects seconds/ms/µs/ns, converts to any timezone with real DST handling, batch-converts whole logs, and covers FILETIME, .NET Ticks, Excel serial dates, and more.
Flatten PDF
Lock in filled form fields (keeps text selectable) or flatten to images (fully uneditable) — explained plainly, with document analysis and a verification report.
Image Background Remover
Remove or change a photo's background — transparent, solid color, or a custom image.
Image Compressor
Batch-compress JPG, PNG, WebP, GIF, BMP & more — compare before/after and download a ZIP.
Image Resizer
Resize images by width or height and export in JPG, PNG, or WebP.
Image Crop Tool
Crop photos with drag selection, zoom, rotate, and flip controls.
JPG to PNG Converter
Convert JPG and JPEG images to PNG directly in your browser.
PNG to WebP Converter
Convert PNG images to WebP with quality control and size comparison.
HEIC to JPG/PNG Converter
Convert HEIC and HEIF images from iPhone to JPG, PNG, WebP, or BMP format.
Image Rotate Tool
Rotate 90°/180°/270° or free-angle, flip, auto EXIF fix, crop after rotate, and batch ZIP export.
Image Blur Tool
Apply blur to images using a slider and download the softened version.
Grayscale Image Converter
Convert photos to grayscale locally in your browser.
Image Color Picker
Pixel-accurate color sampling with HEX/RGB/HSL/HSV/CMYK/LAB, dominant-color palettes, and a WCAG contrast checker.
Compress Image to Exact KB
Compress a JPG, PNG, or WebP image to a precise KB target for government form uploads.
Passport Size Photo Maker
Crop and export passport, visa, PAN, and exam photos to exact pixel specs, with print sheets.
Signature Resizer
Auto-crop, clean, and compress a signature into an exact KB range — 10 government form presets, before/after compare.
Poster Printer
Split an image across multiple A4, A3, Letter, or Tabloid pages to print a large wall poster.
Character Counter
Live character/word counts, 6 readability formulas, keyword density, and 20 social media character limits.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 strings without leaving your browser.
Fancy Font Generator
Turn plain text into 40+ stylish, copy-paste-ready Unicode fonts for Instagram, WhatsApp, and more.
Text to Handwriting Converter
Turn typed English or Hindi text into realistic, natural-looking handwriting on ruled or old paper.
Emoji & Kaomoji Picker
Search and one-click copy emoji, kaomoji, text symbols, and decorations, with favourites and recents.
Online Teleprompter
Smooth, keyboard-controlled scrolling teleprompter with WPM-based speed and mirror mode.
Worksheet Generator
Generate printable maths and handwriting practice worksheets with answer keys, for A4.
PEM to PPK Converter
Convert PEM format SSH private keys to PPK format for use with PuTTY on Windows.
Tic Tac Toe
Play player-versus-player or challenge the computer with easy, medium, and hard modes.
2048
Slide numbered tiles to merge them and reach the 2048 goal with undo and touch controls.
Snake Game
Classic Snake with responsive controls, speed levels, timer tracking, and browser-only high score saving.
Coin Flip
Flip a virtual coin with fair Heads or Tails results, 3D animation, and local flip statistics.
Minesweeper
Play a premium Minesweeper experience with multiple modes, flags, hints, saved progress, and local stats.
Sudoku
Play a polished Sudoku game with notes, hints, solver support, timer tracking, and local progress saving.
Ludo
Play classic Ludo locally with four players, dice rolls, safe zones, and browser persistence.
QR Code Generator
Create QR codes for links, plain text, and contact details.
QR Code Scanner
Scan a QR code with your camera or decode one from an image—private and instant.
Barcode Generator
Generate 12 barcode symbologies — CODE 128, EAN, UPC, ITF-14 and more — with automatic check digits, batch mode and PNG, SVG or JPG export.
Shadow Generator
Create modern CSS box shadows in a few clicks.
Pixel-Perfect Screen Ruler
Drag an on-screen ruler, or measure distance, angle & area on any image with real-unit calibration.
URL Shortener
Shorten long links into clean, shareable URLs with a custom alias and instant QR code.
UTM Builder
Build trackable campaign URLs with UTM parameters for Google Analytics — live preview & QR.
Website SEO Checker
Instant on-page & technical SEO audit with a score, issues and fixes — no signup.
IP Subnet Calculator
Calculate network address, broadcast, usable hosts, wildcard mask, VLSM planning, and CIDR notation.
DNS Lookup
Check A, AAAA, MX, TXT, NS, SOA, CNAME, PTR, SRV, CAA and DNSSEC records for any domain in real time.
DNS Propagation Checker
Verify DNS changes across independent public resolvers with live consensus scoring and TTL analysis.
JWT Debugger
Decode & verify JSON Web Tokens — inspect header, payload, claims, expiry, and signature.
JWT Encoder
Build & sign JSON Web Tokens — edit header/payload, pick an algorithm, get a signed JWT.
Markdown to HTML
Write Markdown with a live preview and copy clean, ready-to-use HTML instantly.
FAQ
Frequently asked questions
Is ToolAdda free to use?
Yes, all core tools are free and work fully in your browser without sign-up.
Do I need to install anything?
No. ToolAdda is a static website that runs instantly without any installation.
Is it mobile-friendly?
Absolutely. The experience is responsive and optimized for phones, tablets, and desktops.
Can I use it offline?
Once loaded, the pages are lightweight and can be revisited locally without any server requirements.
Get started
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From quick number crunching to polished PDF workflows — everything runs free in your browser.
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