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Offline-first utilities
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Online Tools
170 browser-based, privacy-first developer and utility tools
Image Tools
12 toolsCompress, resize, crop and convert
Convert SVG vector files into high-quality PNG images instantly.
Shrink JPG, PNG and WebP files without visible quality loss.
Resize images to exact pixel dimensions or by percentage.
Crop any picture to a custom area or a fixed aspect ratio.
Convert between PNG, JPG and WebP in one click.
Erase a solid or near-solid background and export a transparent PNG.
Turn JPG, PNG and WebP images into one clean PDF document.
Rotate photos by 90°, 180°, 270° or any custom angle.
Mirror any image horizontally or vertically in one click.
Add a text or logo watermark with full control over position and opacity.
Generate favicon files in all required sizes from an uploaded image.
Convert PNG, JPG, SVG, and ICO images into favicon format.
PDF Tools
11 toolsMerge, split, compress and convert
Combine multiple PDF files into one ordered document.
Extract a page range or split a PDF into single pages.
Reduce PDF file size for email and upload limits.
Turn a .docx document into a clean, shareable PDF.
Extract PDF text into an editable Word document.
Export every PDF page as a high-quality JPG or PNG.
Remove the password from a PDF you are allowed to edit.
Lock a PDF with a strong password before you share it.
Turn one page or every page of a PDF the right way up.
Remove unwanted pages and export a tidier document.
Drag pages into the order you want, then export.
Text Tools
7 toolsCount, convert and clean up text
Switch text between upper, lower, title, sentence and slug case.
Live word, sentence, paragraph and reading-time statistics.
Count characters against social and SEO limits in real time.
Generate placeholder text by paragraph, sentence or word count.
Strip repeated lines from any list in a second.
Sort lines alphabetically, numerically, by length or at random.
Reverse characters, words or the order of lines.
Developer Tools
38 toolsFormat, encode and decode
Beautify, minify and validate JSON with clear error messages.
Encode text or files to Base64, including data URLs.
Decode Base64 strings and data URLs back to text.
Percent-encode or decode URLs and query parameters instantly.
Create cryptographically random version 4 UUIDs in bulk.
Compute MD5, SHA-1, SHA-256 and SHA-512 digests from text.
Convert Unix timestamps to dates and back, in UTC or local time.
Shrink HTML by removing whitespace, comments and noise.
Strip whitespace and comments to ship smaller stylesheets.
Reformat minified CSS with clean indentation you can read.
Compress JavaScript by removing comments and dead whitespace.
Reformat compressed JavaScript into readable, indented code.
Indent messy HTML into a clean, readable document tree.
Pretty-print and validate XML with clear error messages.
Turn any XML document into clean, formatted JSON.
Convert JSON objects and arrays into valid XML markup.
Write Markdown and see the rendered HTML update live.
Test regular expressions with live highlighting and capture groups.
Break any URL into protocol, host, path, query and fragment.
Check UUID formatting and identify the version and variant.
Look up the MIME type for any file extension or filename.
Generate random strings, keys and IDs to your own recipe.
Decode, inspect, and validate JSON Web Tokens offline in your browser.
Generate custom JWT tokens using HS256, HS384, or HS512 HMAC algorithms.
Build 5-part cron expressions visually with live human-readable explanations.
Parse cron expressions into plain English schedules and future execution dates.
Beautify, indent, and format SQL queries with customizable keyword casing.
Compress SQL code by stripping comments and unnecessary whitespace.
Convert SQL INSERT statements or table queries into formatted JSON arrays.
Compare two JSON objects side-by-side and highlight additions, deletions, and edits.
Format, validate, and beautify YAML markup with syntax error checking.
Convert YAML configuration files into formatted JSON instantly.
Convert JSON payloads into clean, indented YAML configuration documents.
Convert TOML configuration files into formatted JSON objects.
Build, format, and manage .env environment variable files with ease.
Generate unique CSS selectors for any HTML element.
Generate relative and absolute XPath expressions from HTML elements.
Generate responsive HTML tables visually with customizable rows, columns, and styling.
Generators
3 toolsCreate QR codes, passwords and colors
Calculators
5 toolsQuick, accurate everyday math
Calculate body mass index in metric or imperial units.
Draw random numbers in any range, with or without repeats.
Roll any number of dice with any number of sides.
Work out an exact age in years, months and days.
Every common percentage calculation in one place.
SEO Tools
19 toolsClean URLs and search-ready content
Turn any headline into a clean, SEO-friendly URL slug.
Inspect response headers, status and redirects for any URL.
Build a complete, search-ready meta tag block in seconds.
Create, inspect, and validate robots.txt rules, syntax errors, and crawler conflicts.
Generate and validate XML sitemaps for sitemaps.org 0.9 protocol compliance.
Generate Open Graph and Twitter Card tags for perfect link previews.
Generate JSON-LD schema for Article, FAQ, Organization, Product, and more.
Validate structured data markup and highlight schema errors.
Generate canonical tags for SEO-friendly pages.
Generate hreflang tags for multilingual websites.
Generate 301, 302, 307, and 308 redirect rules for Apache and Nginx.
Calculate keyword frequency, density percentages, n-grams and detect overused words.
Calculate Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG & ARI readability scores.
Perform a complete on-page SEO audit for titles, metas, headings, OG tags & links.
Visualize and audit H1-H6 heading hierarchy to fix skipped levels and missing H1 tags.
Audit internal links, detect broken anchors, orphan links, missing text & nofollow tags.
Validate canonical tags, detect missing or duplicate canonicals & fix indexing issues.
Preview and validate Open Graph social media cards for Facebook, LinkedIn, Discord & Slack.
Preview summary and summary_large_image Twitter/X cards with live tag validation.
Security Tools
3 toolsHashing and password strength, fully offline
Color Tools
5 toolsConvert, sample and build palettes
Turn any HEX colour code into RGB and RGBA values instantly.
Convert RGB channel values into a clean HEX colour code.
Convert RGB colours into hue, saturation and lightness.
Build harmonious palettes from a single HEX colour.
Design linear and radial CSS gradients with a live preview.
CSS Tools
8 toolsVisual generators for modern CSS
Craft layered box-shadow CSS with an instant preview.
Shape corners visually and copy the border-radius CSS.
Draw polygon and shape clip-paths with a live preview.
Build frosted-glass panels with backdrop blur CSS.
Generate soft-UI shadows for raised and pressed surfaces.
Calculate and compare CSS selector specificity scores.
Visually build Flexbox layouts and generate CSS instantly.
Create CSS Grid layouts visually with live preview and generated code.
Utility Tools
5 toolsScanners, pickers and everyday helpers
Decode any QR code from an image, right in your browser.
Create Code128, EAN, UPC and more as PNG or SVG.
Read barcodes from an uploaded image or screenshot.
Pick winners fairly from any list of names.
Flip a virtual coin with a real 3D animation.
Finance Tools
5 toolsEMIs, loans, GST, interest and currency exchange
Calculate loan EMI, total interest payable, and amortization schedule.
Calculate loan repayments, interest savings, and prepayment impacts.
Calculate GST inclusive, GST exclusive, and tax amounts.
Calculate investment growth, maturity amount, and compound interest.
Convert global currencies with real-time exchange rates.
File Tools
6 toolsZip archives, CSV, JSON and Excel converters
Convert CSV files into downloadable Excel XLSX spreadsheets.
Unzip archive files directly in your browser without uploading.
Compress multiple files into a single ZIP archive locally.
Convert CSV spreadsheets into clean, structured JSON arrays.
Convert JSON objects and arrays into CSV spreadsheets.
Convert Excel (.xlsx and .xls) workbooks into clean CSV format.
Encoding Tools
4 toolsHTML entities, binary, ASCII and Morse code
Encode special characters into HTML entities and decode entities back to text.
Convert between Binary, Text, Decimal, Hex, Octal, and ASCII.
Convert text to ASCII decimal codes and ASCII numbers back to text.
Convert text to Morse code, decode Morse, and listen with audio playback.
Network Tools
8 toolsIP, DNS, WHOIS, Port and Ping diagnostics
Find detailed IP address geolocation, ISP, ASN, and map location.
Query domain DNS records including A, AAAA, MX, TXT, NS, and CNAME.
Retrieve domain registration details, registrar, dates, and name servers.
Check if a specific TCP/UDP port is open on a target server.
Measure server latency, response time, and connection uptime.
Check DNS record propagation across global resolvers worldwide.
Calculate CIDR subnet masks, usable IP ranges, broadcast IPs, and total host counts.
Divide networks into subnets and generate detailed subnetting tables.
Converter Tools
8 toolsUnit, length, weight, area, volume, temp and data storage
Convert between length, weight, area, volume, temperature, speed, and data storage.
Convert meters, kilometers, centimeters, inches, feet, yards, and miles.
Convert kilograms, grams, pounds, ounces, tonnes, and stones accurately.
Convert between Celsius, Fahrenheit, Kelvin, and Rankine in real time.
Convert square meters, square feet, acres, hectares, and square miles.
Convert liters, milliliters, gallons, cubic meters, cups, and fluid ounces.
Convert km/h, mph, meters per second, knots, and feet per second.
Convert bits, bytes, KB, MB, GB, TB, and PB instantly.
Date & Time Tools
5 toolsTime zone conversion, date differences, business days, timers and stopwatches
Convert time between global cities and time zones with live daylight saving info.
Calculate exact years, months, weeks, days, and hours between two dates.
Calculate working days between dates excluding weekends and holidays.
Customizable countdown timer with fullscreen mode and audio alarm tones.
Millisecond precision online stopwatch with lap recording and CSV export.
Health Tools
7 toolsCalorie, BMR, body fat, ideal weight, pace and hydration calculators
Estimate daily calorie targets for weight loss, maintenance, or muscle gain.
Calculate Basal Metabolic Rate using Mifflin-St Jeor and Harris-Benedict formulas.
Estimate body fat percentage using US Navy body measurement formulas.
Calculate healthy weight ranges using Devine, Hamwi, Robinson, and Miller formulas.
Calculate running, walking, or cycling pace, time, and average speed.
Estimate due date, current week, trimester, and milestones from LMP or conception.
Calculate recommended daily water intake based on body weight, exercise, and climate.
DevOps Tools
4 toolsDocker, Kubernetes, Nginx and Apache configurations
Validate docker-compose.yml files for syntax errors and schema issues.
Validate Kubernetes manifests for required fields and configuration errors.
Generate production-ready Nginx server blocks for web apps, reverse proxies, and SSL.
Build Apache VirtualHost and .htaccess configurations visually.
Web Tools
2 toolsEntity encoders, decoders, HTML & selectors
Accessibility Tools
2 toolsWCAG contrast checkers and accessibility auditors
Web Performance Tools
3 toolsBrotli/Gzip compression calculators & size analyzers
Category Hubs
Browse all 22 curated tool categories
Image Tools
Explore free image tools to compress, resize, convert, crop, and optimize photos online with fast browser-based processing and zero server uploads.
PDF Tools
Explore free online PDF tools to merge, split, compress, unlock, and convert document files fast directly in your web browser with total privacy.
Text Tools
Explore free text tools to count words, analyze character counts, convert case styles, and clean up content fast without uploading your data.
Developer Tools
Explore free developer tools to format JSON, encode Base64 strings, parse JWT tokens, and generate cron expressions with fast client-side speed.
Generators
Explore free online generators to create QR codes, secure passwords, custom color palettes, and random items instantly with zero registration.
Calculators
Explore free online calculators to estimate loan EMIs, compound interest, BMI metrics, calories, and daily math formulas with accurate results.
SEO Tools
Explore free SEO tools to analyze webpage health, check canonical tags, evaluate keyword density, and preview social cards for higher search rankings.
Security Tools
Explore free security tools to measure password strength, generate cryptographic SHA hashes, and decode JWT payloads safely inside your browser.
Color Tools
Explore free color tools to convert HEX, RGB, and HSL values, pick precise colors, check WCAG contrast ratios, and design CSS gradient palettes.
CSS Tools
Explore free visual CSS generators for box shadows, glassmorphism, grid layouts, flexbox structures, and clip paths to get clean code fast now.
Utility Tools
Explore free utility tools to read QR codes, pick random names, generate barcodes, and solve everyday quick tasks fast online without signup.
Finance Tools
Explore free finance tools to calculate loan EMIs, evaluate compound interest, estimate GST taxes, and convert global currencies in real time.
File Tools
Explore free file tools to create ZIP archives, convert CSV, JSON, and Excel documents locally in your web browser without uploading sensitive data.
Encoding Tools
Explore free encoding tools to translate text into HTML entities, binary codes, ASCII numbers, and Morse code signals with instant browser speed.
Network Tools
Explore free network tools to lookup IP details, check DNS records, inspect WHOIS domain data, test open ports, and track propagation worldwide.
Converter Tools
Explore free online converter tools to convert units across length, weight, area, volume, temperature, speed, and digital data storage fast.
Date & Time Tools
Explore free date and time tools to convert global time zones, calculate business days, measure date gaps, and track time with online timers.
Health Tools
Explore free health tools to calculate daily calories, BMR ratios, body fat percentage, ideal body weight, running pace, and water intake fast.
DevOps Tools
Explore free DevOps tools to validate Docker Compose files, check Kubernetes manifests, and generate Nginx or Apache web server configurations.
Web Tools
Explore free web tools to encode HTML entities, decode structural markup, generate CSS selectors, and create clean sitemaps for your website.
Accessibility Tools
Explore free web accessibility tools to audit webpage HTML structure, verify WCAG contrast ratios, and optimize accessible site design fast.
Web Performance Tools
Explore free web performance tools to calculate Brotli and Gzip compression savings, analyze payload sizes, and speed up webpage load times.
Blog Articles & Guides
In-depth articles, tutorials, and productivity roundups
What Is an IP Address? Everything Beginners Need to Know
Learn what an IP address is, how IPv4 and IPv6 work, public vs private IPs, static vs dynamic addresses, and how to look up an IP safely.
DNS Records Explained: A, AAAA, MX, TXT, CNAME, and More
Learn how DNS records work, including A, AAAA, MX, TXT, CNAME, NS, and SOA records, with simple examples and practical DNS lookup tips.
What Is WHOIS Lookup and Why Should You Use It?
Learn what WHOIS lookup is, what domain registration data it reveals, how to use it, and why it matters for security, research, and domain ownership.
CSS Neumorphism: Is It Still Worth Using in 2026?
Learn what CSS neumorphism is, its pros and cons, accessibility risks, and when to use it in modern web design with practical CSS examples.
Modern Glassmorphism UI Design Explained
Learn modern glassmorphism UI design with CSS. Discover glass effects, blur, transparency, borders, shadows, examples, and practical design tips.
Complete Guide to CSS Box Shadows
Learn CSS box shadow from scratch. Understand offsets, blur, spread, inset shadows, multiple shadows, examples, common mistakes, and best practices.
How to Create Beautiful CSS Gradients
Learn how to create beautiful CSS gradients using linear, radial, and conic gradients with practical examples, color tips, and easy CSS techniques.
HEX, RGB, and HSL Colors Explained for Beginners
Learn HEX, RGB, and HSL colors with simple examples. Understand CSS color codes, how they work, how to convert them, and when to use each format.
Barcode vs QR Code: What's the Difference?
Barcode vs QR Code explained simply. Learn how they work, what they store, where they are used, and which option is right for you.
What Is a QR Code and How Does It Work?
Learn what a QR code is, how QR codes work, what they store, how smartphones scan them, and how to create reliable QR codes for everyday use.
MD5 vs SHA-256 vs SHA-512: Which Hash Algorithm Is Best?
Compare MD5 vs SHA-256 vs SHA-512 to understand security, speed, hash length, and use cases. Learn which hash algorithm is best for your project.
UUID Explained: What It Is and Why Developers Use It
Learn what a UUID is, how UUIDs work, the different UUID versions, and why developers use them for unique IDs in apps, APIs, databases, and more.
Beginner's Guide to Base64 Encoding and Decoding
Learn Base64 encoding and decoding with simple examples. Understand how Base64 works, when to use it, and why it is not encryption.
JSON Formatter vs JSON Validator Explained: What's the Difference?
Learn the difference between a JSON formatter and JSON validator, how each works, when to use them, and how to fix common JSON syntax errors.
How Password Strength Is Calculated: A Simple Guide
Learn how password strength is calculated using length, randomness, common patterns, and attack resistance. See how to create stronger passwords safely.
How to Generate Strong Passwords That Can't Be Guessed
Learn how to generate strong passwords that are hard to guess. Discover the right password length, randomness, unique passwords, and simple security tips.
Word Count vs Character Count: What's the Difference?
Learn the difference between word count vs character count, when to use each, and how to count words, spaces, punctuation, and characters.
How to Remove Duplicate Lines from Text Instantly
Learn how to remove duplicate lines from text instantly using simple methods, online tools, spreadsheets, or code.
PDF vs Word: Which Format Is Better for Sharing Documents?
PDF vs Word explained: compare formatting, editing, security, compatibility, and sharing to choose the best document format for your needs.
Best Ways to Reduce PDF File Size Without Losing Quality
Learn the best ways to reduce PDF file size without losing quality. Discover simple compression methods, optimization tips, and free online PDF tools.
How to Split Large PDF Files in Seconds for Free
Split large PDF files online in seconds for free. Learn the fastest, safest way to separate PDF pages without installing software or losing quality.
How to Merge PDF Files Online for Free
Learn how to merge PDF files online for free in minutes. Follow this secure step-by-step guide and combine PDFs easily using TechbyJeel Tools.
How to Convert Images to PDF Without Installing Software
Learn how to convert images to PDF online without installing software. Follow simple steps to combine JPG, PNG, and photos into a PDF file.
How to Compress Images Without Losing Quality Guide
Learn how to compress images without losing quality using the best techniques and free online tools. Reduce file size while keeping images sharp.
PNG vs JPG vs WebP: Which Image Format Should You Use in 2026?
Learn the difference between PNG, JPG, and WebP image formats. Discover which format is best for websites, social media, printing, and SEO.
25 Free Online Tools Everyone Should Bookmark in 2026
Discover 25 free online tools everyone should bookmark in 2026. Boost productivity with image, PDF, SEO, developer, calculator, and utility tools.
Recommended Resources & Software
Curated third-party software, AI video creation tools, and productivity recommendations
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Frequently asked questions about browser tools, client-side privacy, and licensing.
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Comprehensive Privacy Policy for TechbyJeel Tools detailing client-side browser processing, zero server data storage, telemetry logging, and user privacy rights.
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Official Terms of Service governing access, acceptable use, intellectual property, and service availability for TechbyJeel Tools.
Disclaimer
Official Disclaimer for TechbyJeel Tools detailing calculation precision, non-reliance notices, financial disclaimer, and third-party resource disclosures.
Cookie Policy
In-depth Cookie Policy detailing essential cookies, Google Analytics, Google AdSense advertising cookies, browser management, and opt-out options for TechbyJeel Tools.
DMCA & Copyright
Digital Millennium Copyright Act (DMCA) policy for TechbyJeel Tools - copyright protection, takedown notice guidelines, and designated agent contact.