Developer Tools
Built for Speed
200+ free online tools for developers. Format, convert, generate, and transform your data instantly.
100% Secure & Private🔒
All processing happens in your browser. Your files and data never leave your device.
Developer Tools
30 toolsInternet Speed Test
Test your internet connection speed. Measure download, upload speeds, and latency.
Developer ToolsOnline Notepad
Simple browser-based notes with auto-save.
Developer ToolsCode Snippet Share
Share code snippets with syntax highlighting using a simple, shareable link.
Developer ToolsJSON Share
Share JSON data with others using a simple, shareable link.
Developer ToolsJSON Formatter
Format and beautify JSON data. Pretty print JSON with syntax highlighting.
Developer ToolsJSON Compare
Compare two JSON objects and find differences. Visual JSON diff tool.
Developer ToolsJSON Validator
Validate JSON syntax and format. Check if JSON is valid and get formatted output.
Developer ToolsEpoch Converter
Convert Unix timestamps to dates.
Developer ToolsXML Formatter
Pretty-print, validate, and minify XML.
Developer ToolsSQL Formatter
Beautify and format SQL queries.
Developer ToolsCSV to JSON
Convert CSV data to JSON format.
Developer ToolsJSON to CSV
Turn JSON data into CSV or Excel format.
Developer ToolsCSV to Excel
Convert CSV files to Excel format.
Developer ToolsExcel to CSV
Convert Excel files to CSV format.
Developer ToolsYAML to JSON
Convert YAML to JSON format.
Developer ToolsYAML Formatter
Format and beautify YAML code with proper indentation.
Developer ToolsJSON to XML
Convert JSON data to XML format.
Developer ToolsXML to JSON
Convert XML data to JSON format.
Developer ToolsMock Data Generator
Generate mock JSON/CSV data for testing.
Developer ToolsCron Builder
Build, parse, and translate cron expressions.
Developer ToolsRegex Tester
Test and debug regular expressions with real-time matching.
Developer ToolsCode Minifier
Minify JavaScript, CSS, and HTML code.
Developer ToolsCode Beautifier
Format and beautify HTML, CSS, JS code.
Developer ToolsJavaScript Obfuscator
Obfuscate JavaScript code to protect your source code.
Developer ToolsJSON to Kotlin Data Class
Convert JSON to Kotlin data classes with support for Gson, Moshi, and kotlinx.serialization.
Developer ToolsText Diff
Compare two pieces of text and find differences.
Developer ToolsString Case Converter
Convert between snake_case, camelCase, kebab-case.
Developer ToolsLorem Ipsum Generator
Generate placeholder text for designs.
Developer ToolsAPI Tester
Test REST API endpoints.
Developer ToolsMock APIs
Ready-made mock APIs for testing.
Developer ToolsEncoding & Security
10 toolsBase64 Encoder/Decoder
Encode and decode Base64 strings.
Encoding & SecurityURL Encoder/Decoder
Encode and decode URLs and query strings.
Encoding & SecurityBase64 to File
Convert Base64 string back to a file.
Encoding & SecurityJWT Decoder
Decode and inspect JWT tokens.
Encoding & SecurityHash Generator
Generate MD5, SHA-1, SHA-256 hashes.
Encoding & SecurityUUID Generator
Generate UUID/GUID values.
Encoding & SecurityPassword Generator
Create strong, secure passwords.
Encoding & SecurityPassword Strength Checker
Test password strength and security.
Encoding & SecuritySecret Generator
Generate random secrets with entropy measurement.
Encoding & SecurityBinary to Hex
Convert between binary and hexadecimal.
Encoding & SecuritySEO & Network
15 toolsDNS Lookup
Look up DNS records.
SEO & NetworkWHOIS Lookup
Look up domain registration info.
SEO & NetworkPing Checker
Check server response time.
SEO & NetworkSSL Checker
Check SSL certificate validity.
SEO & NetworkIP Lookup
Get IP address information.
SEO & NetworkPort Scanner
Scan for open ports on servers.
SEO & NetworkSitemap Generator
Generate XML sitemaps for websites.
SEO & NetworkRobots.txt Generator
Create robots.txt files for SEO.
SEO & NetworkHtaccess Redirect Generator
Generate .htaccess redirect rules.
SEO & NetworkCanonical URL Checker
Check canonical URL configuration.
SEO & NetworkMeta Tags Generator
Generate SEO meta tags.
SEO & NetworkSERP Preview Tool
Preview how pages appear in Google.
SEO & NetworkWebsite SEO Checker
Analyze website SEO performance.
SEO & NetworkWebsite to PDF
Convert webpages to PDF.
SEO & NetworkWhat is my Local IP Address
Find your local IP address on your network.
SEO & NetworkUI & Design
12 toolsMarkdown to HTML
Convert Markdown to HTML.
UI & DesignHTML Entity Encoder
Encode and decode HTML entities.
UI & DesignColor Converter
Convert between HEX, RGB, HSL colors.
UI & DesignColor Palette Generator
Generate color palettes from images.
UI & DesignHex to RGB
Convert HEX colors to RGB values.
UI & DesignBox Shadow Generator
Create CSS box shadows visually.
UI & DesignFlexbox Playground
Learn and experiment with CSS Flexbox.
UI & DesignTailwind Playground
Preview Tailwind CSS utility classes.
UI & DesignFavicon Generator
Create favicons for websites.
UI & DesignOG/Meta Tag Generator
Generate Open Graph and meta tags.
UI & DesignHTML Preview
Preview HTML code in real-time. See how your HTML renders instantly.
UI & DesignSVG to Vector Drawable
Convert SVG icons to Android VectorDrawable XML with currentColor support.
UI & DesignAI Career Tools
1 toolsPDF Tools
27 toolsMerge PDF
Combine multiple PDF files into one.
PDF ToolsSplit PDF
Split PDF into multiple files.
PDF ToolsReorder PDF Pages
Rearrange pages in a PDF file.
PDF ToolsDelete PDF Pages
Remove pages from PDF files.
PDF ToolsAdd PDF Pages
Add new pages to PDF files.
PDF ToolsRotate PDF
Rotate PDF pages by any angle.
PDF ToolsCompress PDF
Reduce PDF file size.
PDF ToolsOptimize PDF Quality
Optimize PDF quality and size.
PDF ToolsRepair PDF
Fix corrupted PDF files.
PDF ToolsPDF to JPG
Convert PDF pages to JPG images.
PDF ToolsPDF to PNG
Convert PDF pages to PNG images.
PDF ToolsJPG to PDF
Convert JPG images to PDF.
PDF ToolsHTML to PDF
Convert HTML content to PDF.
PDF ToolsScan to PDF
Convert scanned images to PDF.
PDF ToolsEdit PDF
Edit text and images in PDF.
PDF ToolsHighlight & Annotate PDF
Add highlights and annotations to PDF.
PDF ToolsDraw on PDF
Draw and sketch on PDF files.
PDF ToolsWatermark PDF
Add watermarks to PDF files.
PDF ToolsProtect PDF
Password protect PDF files.
PDF ToolsUnlock PDF
Remove password from PDF files.
PDF ToolsSign PDF
Add digital signatures to PDF.
PDF ToolsPDF to Word
Convert PDF to Word document.
PDF ToolsWord to PDF
Convert Word document to PDF.
PDF ToolsPDF to Excel
Convert PDF to Excel spreadsheet.
PDF ToolsExcel to PDF
Convert Excel to PDF.
PDF ToolsPDF to PowerPoint
Convert PDF to PowerPoint.
PDF ToolsPowerPoint to PDF
Convert PowerPoint to PDF.
PDF ToolsImage Tools
17 toolsPNG to JPG
Convert PNG images to JPG format.
Image ToolsJPG to PNG
Convert JPG images to PNG format.
Image ToolsJPEG to JPG
Convert JPEG to JPG format.
Image ToolsJPG to JPEG
Convert JPG to JPEG format.
Image ToolsPNG to SVG
Convert PNG to vector SVG format.
Image ToolsSVG to PNG
Convert SVG to PNG format.
Image ToolsWebP to JPG
Convert WebP to JPG format.
Image ToolsWebP to PNG
Convert WebP to PNG format.
Image ToolsHEIC to JPG
Convert iPhone HEIC to JPG.
Image ToolsJFIF to PNG
Convert JFIF to PNG format.
Image ToolsImage to PDF
Convert images to PDF document.
Image ToolsPNG to PDF
Convert PNG images to PDF.
Image ToolsImage Compressor
Compress images to reduce file size.
Image ToolsImage Size Limiter
Limit image dimensions and file size.
Image ToolsPhoto Resizer
Resize photos to specific dimensions.
Image ToolsCrop Image
Crop and trim images.
Image ToolsImage to Base64
Convert images to Base64 strings.
Image ToolsUtilities
20 toolsAge Calculator
Calculate age from birth date.
UtilitiesSignature Maker
Create digital signatures.
UtilitiesDate Range Generator
Generate date ranges with day names.
UtilitiesPomodoro Timer
Focus timer with work/break cycles. No signup, instant start.
UtilitiesDate Calculator
Calculate date differences.
UtilitiesIST ↔ UTC Converter
Convert between IST and UTC time.
UtilitiesTime Converter
Convert between time zones.
UtilitiesBMI Calculator
Calculate Body Mass Index.
UtilitiesPercentage Calculator
Calculate percentages easily.
UtilitiesDiscount Calculator
Calculate discounts and savings.
UtilitiesCurrency Converter
Convert between currencies.
UtilitiesRoman Numeral Converter
Convert Roman numerals.
UtilitiesQR Code Generator
Generate QR codes for any text.
UtilitiesBarcode Generator
Generate barcodes for products.
UtilitiesWord Counter
Count words, characters, sentences, and paragraphs.
UtilitiesRandom Name Picker
Pick random names from a list.
UtilitiesRandom Number Generator
Generate random numbers.
UtilitiesRandom Task Assigner
Randomly assign tasks to people.
UtilitiesZip Extractor
Extract ZIP archive files.
UtilitiesRar Extractor
Extract RAR archive files.
UtilitiesDocument Generators
20 toolsResume Generator
Create professional resumes.
Document GeneratorsInvoice Generator
Generate professional invoices.
Document GeneratorsGST Bill Generator
Generate GST compliant bills.
Document GeneratorsSalary Slip Generator
Generate employee salary slips.
Document GeneratorsRent Receipt Generator
Generate rent payment receipts.
Document GeneratorsFee Receipt Generator
Generate fee payment receipts.
Document GeneratorsExperience Letter Generator
Generate work experience letters.
Document GeneratorsRelieving Letter Generator
Generate employee relieving letters.
Document GeneratorsInternship Certificate Generator
Generate internship certificates.
Document GeneratorsAward Certificate Generator
Generate award certificates.
Document GeneratorsID Card Generator
Generate employee ID cards.
Document GeneratorsElectricity Bill Generator
Generate electricity bills.
Document GeneratorsMobile Bill Generator
Generate mobile phone bills.
Document GeneratorsBroadband Bill Generator
Generate broadband internet bills.
Document GeneratorsMaintenance Bill Generator
Generate apartment maintenance bills.
Document GeneratorsMedical Prescription Generator
Generate medical prescriptions.
Document GeneratorsHotel Booking Generator
Generate hotel booking confirmations.
Document GeneratorsFlight Ticket Generator
Generate flight ticket confirmations.
Document GeneratorsMovie Ticket Generator
Generate movie tickets.
Document GeneratorsGym Membership Generator
Generate gym membership cards.
Document GeneratorsFake Generators
13 toolsFake ChatGPT Chat Generator
Create fake ChatGPT conversation screenshots for parody and entertainment. Customize messages, add images, and create realistic ChatGPT-style conversations.
Fake GeneratorsFake WhatsApp Chat
Create fake WhatsApp conversations.
Fake GeneratorsFake Tweet
Create fake Twitter/X posts.
Fake GeneratorsFake Instagram DM
Create fake Instagram messages.
Fake GeneratorsFake Facebook Chat
Create fake Facebook conversations.
Fake GeneratorsFake Boarding Pass
Create fake boarding passes.
Fake GeneratorsNewspaper Clipping Generator
Create custom newspaper clippings with your own headlines and stories. Generate authentic-looking newspaper layouts.
Fake GeneratorsRestaurant Receipt Generator
Generate fictional restaurant receipts with humorous menu items for UI/UX design demos.
Fake GeneratorsFake Grocery Bill Generator
Generate playful, cartoon-style grocery bill templates with fictional items for UI/UX design demos.
Fake GeneratorsGoogle Suggestion Generator
Create fake Google search suggestions for parody and entertainment. Customize your own search suggestions with Google-style interface.
Fake GeneratorsBreaking News Generator
Generate breaking news broadcasts with custom headlines and tickers. 100% FREE online tool.
Fake GeneratorsPoll Result Generator
Generate hilarious poll results with exaggerated percentages and fun animations. All questions and results are fictional.
Fake GeneratorsFake Notification Prank Generator
Generate hilarious fake notifications with funny messages for visual pranks. All senders and content are fictional. Perfect for harmless pranks and entertainment.
Fake GeneratorsFinance
13 toolsEMI Calculator
Calculate loan EMI payments.
FinanceHome Loan EMI
Calculate home loan EMI.
FinanceCar Loan EMI
Calculate car loan EMI.
FinancePersonal Loan EMI
Calculate personal loan EMI.
FinanceCredit Card EMI
Calculate credit card EMI.
FinanceLoan Eligibility Calculator
Check your loan eligibility.
FinanceSIP Calculator
Calculate SIP returns.
FinancePPF Calculator
Calculate PPF maturity amount.
FinanceFD Calculator
Calculate fixed deposit returns.
FinanceCompound Interest Calculator
Calculate compound interest.
FinanceIncome Tax Calculator
Calculate income tax liability.
FinanceTDS Calculator
Calculate TDS deductions.
FinanceGST Calculator
Calculate GST amounts.
FinanceAbout GeeksPrep Tools
GeeksPrep Tools is a comprehensive collection of 200+ free online developer tools designed to help developers, designers, and professionals work more efficiently. All our tools are 100% free, require no registration, and process data entirely in your browser for maximum privacy and security.
Developer-Focused
From JSON formatting and code beautification to API testing and data conversion, our developer tools cover every aspect of modern software development. Whether you're working with APIs, processing data, or formatting code, we have the tools you need.
100% Private & Secure
All processing happens entirely in your browser. Your files, data, and information never leave your device—they're not uploaded to servers, stored in databases, or transmitted over the network. Complete privacy guaranteed.
Lightning Fast
Since all processing happens locally in your browser, you get instant results without waiting for server uploads, network transfers, or external processing. Most operations complete in milliseconds.
Works Everywhere
Browser-based tools work on any device with a web browser—Windows, Mac, Linux, iOS, Android. No software installation required. Most tools even work offline after the initial page load.
How It Works
Choose Your Tool
Browse our collection of 200+ free tools organized into 11 categories, or use the search bar to find a specific tool. From JSON formatters to PDF converters, we have tools for every need.
Use Instantly
No registration required. Just open the tool and start using it immediately. All tools are ready to use right away—no sign-up, no login, no account creation needed.
100% Private
All processing happens in your browser. Your data never leaves your device—no uploads, no storage, no tracking. Complete privacy and security guaranteed.
Frequently Asked Questions
❓Are these tools really free?
Yes, all our tools are 100% free with no hidden costs, no subscriptions, and no premium tiers. You can use all 200+ tools without any payment or registration. We believe in providing free, accessible tools for everyone.
🔐Do I need to register or create an account?
No, you can use all tools without any registration or account creation. Just open the tool and start using it immediately. No sign-up required, no email needed, no personal information collected.
🛡️Is my data secure and private?
Yes, absolutely. All processing happens entirely in your browser using client-side JavaScript. Your files, data, and information never leave your device—they're not uploaded to servers, stored in databases, or transmitted over the network. Complete privacy guaranteed.
📱Can I use these tools offline?
Most tools work offline after the initial page load, as all processing happens in your browser. Once the page is loaded, you can use most tools without an internet connection, making them perfect for work in remote locations or areas with unreliable connectivity.
🛠️What types of tools are available?
We offer 200+ tools across 11 categories including Developer Tools (JSON, CSV, code formatting), PDF Tools (merge, split, convert), Image Tools, Document Generators (resumes, invoices), AI Career Tools (ATS resume checker), Finance Calculators, Encoding & Security tools, SEO & Network tools, and more.
📊Are there any file size limits?
No, there are no file size limits. Our browser-based tools can handle files of any size, limited only by your device's memory. This is especially valuable when working with large JSON files, extensive codebases, or massive datasets.
🔍Do you store or track my usage?
No, we don't store, track, or log any of your usage. All tools work anonymously without any tracking, analytics, or data collection. Your privacy is guaranteed. No cookies, no tracking pixels, no data collection.
💼Can I use these tools for commercial purposes?
Yes, all tools are free to use for both personal and commercial purposes. There are no restrictions on usage. Use them for your business, projects, or any purpose you need.
🛠️ GeeksPrep Tools
A collection of 200+ free online developer tools. No registration, no ads, just tools that work. Built with ❤️ for developers.