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Developer Tools
Built for Speed

200+ free online tools for developers. Format, convert, generate, and transform your data instantly.

200+

Free Tools

Developer Tools

28 tools

Internet Speed Test

Test your internet connection speed. Measure download, upload speeds, and latency.

Developer Tools

JSON Formatter

Format and beautify JSON data. Pretty print JSON with syntax highlighting.

Developer Tools

JSON Compare

Compare two JSON objects and find differences. Visual JSON diff tool.

Developer Tools

JSON Validator

Validate JSON syntax and format. Check if JSON is valid and get formatted output.

Developer Tools

JSON Share

Share JSON data with others using a simple, shareable link.

Developer Tools

Epoch Converter

Convert Unix timestamps to dates.

Developer Tools

XML Formatter

Pretty-print, validate, and minify XML.

Developer Tools

SQL Formatter

Beautify and format SQL queries.

Developer Tools

CSV to JSON

Convert CSV data to JSON format.

Developer Tools

JSON to CSV

Turn JSON data into CSV or Excel format.

Developer Tools

CSV to Excel

Convert CSV files to Excel format.

Developer Tools

Excel to CSV

Convert Excel files to CSV format.

Developer Tools

YAML to JSON

Convert YAML to JSON format.

Developer Tools

JSON to XML

Convert JSON data to XML format.

Developer Tools

XML to JSON

Convert XML data to JSON format.

Developer Tools

Fake Data Generator

Generate mock JSON/CSV data for testing.

Developer Tools

Online Notepad

Simple browser-based notes with auto-save.

Developer Tools

Cron Builder

Build, parse, and translate cron expressions.

Developer Tools

Regex Tester

Test and debug regular expressions with real-time matching.

Developer Tools

Code Minifier

Minify JavaScript, CSS, and HTML code.

Developer Tools

Code Beautifier

Format and beautify HTML, CSS, JS code.

Developer Tools

Text Diff

Compare two pieces of text and find differences.

Developer Tools

String Case Converter

Convert between snake_case, camelCase, kebab-case.

Developer Tools

Lorem Ipsum Generator

Generate placeholder text for designs.

Developer Tools

Word Counter

Count words, characters, sentences, and paragraphs.

Developer Tools

Markdown to HTML

Convert Markdown to HTML.

Developer Tools

HTML Entity Encoder

Encode and decode HTML entities.

Developer Tools

Code Snippet Share

Share code snippets with syntax highlighting using a simple, shareable link.

Developer Tools

🔐

Encoding & Security

10 tools

Base64 Encoder/Decoder

Encode and decode Base64 strings.

Encoding & Security

URL Encoder/Decoder

Encode and decode URLs and query strings.

Encoding & Security

Base64 to File

Convert Base64 string back to a file.

Encoding & Security

JWT Decoder

Decode and inspect JWT tokens.

Encoding & Security

Hash Generator

Generate MD5, SHA-1, SHA-256 hashes.

Encoding & Security

UUID Generator

Generate UUID/GUID values.

Encoding & Security

Password Generator

Create strong, secure passwords.

Encoding & Security

Password Strength Checker

Test password strength and security.

Encoding & Security

Secret Generator

Generate random secrets with entropy measurement.

Encoding & Security

Binary to Hex

Convert between binary and hexadecimal.

Encoding & Security

🎨

UI & Design

8 tools

Color Converter

Convert between HEX, RGB, HSL colors.

UI & Design

Color Palette Generator

Generate color palettes from images.

UI & Design

Hex to RGB

Convert HEX colors to RGB values.

UI & Design

Box Shadow Generator

Create CSS box shadows visually.

UI & Design

Flexbox Playground

Learn and experiment with CSS Flexbox.

UI & Design

Tailwind Playground

Preview Tailwind CSS utility classes.

UI & Design

Favicon Generator

Create favicons for websites.

UI & Design

OG/Meta Tag Generator

Generate Open Graph and meta tags.

UI & Design

🌐

SEO & Network

15 tools

DNS Lookup

Look up DNS records.

SEO & Network

WHOIS Lookup

Look up domain registration info.

SEO & Network

Ping Checker

Check server response time.

SEO & Network

SSL Checker

Check SSL certificate validity.

SEO & Network

IP Lookup

Get IP address information.

SEO & Network

Port Scanner

Scan for open ports on servers.

SEO & Network

Sitemap Generator

Generate XML sitemaps for websites.

SEO & Network

Robots.txt Generator

Create robots.txt files for SEO.

SEO & Network

Htaccess Redirect Generator

Generate .htaccess redirect rules.

SEO & Network

Canonical URL Checker

Check canonical URL configuration.

SEO & Network

Meta Tags Generator

Generate SEO meta tags.

SEO & Network

SERP Preview Tool

Preview how pages appear in Google.

SEO & Network

Website SEO Checker

Analyze website SEO performance.

SEO & Network

Website to PDF

Convert webpages to PDF.

SEO & Network

API Tester

Test REST API endpoints.

SEO & Network

🔧

Utilities

19 tools

Age Calculator

Calculate age from birth date.

Utilities

Date Calculator

Calculate date differences.

Utilities

IST ↔ UTC Converter

Convert between IST and UTC time.

Utilities

Time Converter

Convert between time zones.

Utilities

BMI Calculator

Calculate Body Mass Index.

Utilities

Percentage Calculator

Calculate percentages easily.

Utilities

Discount Calculator

Calculate discounts and savings.

Utilities

Currency Converter

Convert between currencies.

Utilities

Roman Numeral Converter

Convert Roman numerals.

Utilities

QR Code Generator

Generate QR codes for any text.

Utilities

Barcode Generator

Generate barcodes for products.

Utilities

Signature Maker

Create digital signatures.

Utilities

Random Name Picker

Pick random names from a list.

Utilities

Random Number Generator

Generate random numbers.

Utilities

Random Task Assigner

Randomly assign tasks to people.

Utilities

Day Downloader

Download day calendars.

Utilities

Zip Extractor

Extract ZIP archive files.

Utilities

Rar Extractor

Extract RAR archive files.

Utilities

Mock APIs

Ready-made mock APIs for testing.

Utilities

🖼️

Image Tools

17 tools

PNG to JPG

Convert PNG images to JPG format.

Image Tools

JPG to PNG

Convert JPG images to PNG format.

Image Tools

JPEG to JPG

Convert JPEG to JPG format.

Image Tools

JPG to JPEG

Convert JPG to JPEG format.

Image Tools

PNG to SVG

Convert PNG to vector SVG format.

Image Tools

SVG to PNG

Convert SVG to PNG format.

Image Tools

WebP to JPG

Convert WebP to JPG format.

Image Tools

WebP to PNG

Convert WebP to PNG format.

Image Tools

HEIC to JPG

Convert iPhone HEIC to JPG.

Image Tools

JFIF to PNG

Convert JFIF to PNG format.

Image Tools

Image to PDF

Convert images to PDF document.

Image Tools

PNG to PDF

Convert PNG images to PDF.

Image Tools

Image Compressor

Compress images to reduce file size.

Image Tools

Image Size Limiter

Limit image dimensions and file size.

Image Tools

Photo Resizer

Resize photos to specific dimensions.

Image Tools

Crop Image

Crop and trim images.

Image Tools

Image to Base64

Convert images to Base64 strings.

Image Tools

📄

PDF Tools

27 tools

Merge PDF

Combine multiple PDF files into one.

PDF Tools

Split PDF

Split PDF into multiple files.

PDF Tools

Reorder PDF Pages

Rearrange pages in a PDF file.

PDF Tools

Delete PDF Pages

Remove pages from PDF files.

PDF Tools

Add PDF Pages

Add new pages to PDF files.

PDF Tools

Rotate PDF

Rotate PDF pages by any angle.

PDF Tools

Compress PDF

Reduce PDF file size.

PDF Tools

Optimize PDF Quality

Optimize PDF quality and size.

PDF Tools

Repair PDF

Fix corrupted PDF files.

PDF Tools

PDF to Word

Convert PDF to Word document.

PDF Tools

Word to PDF

Convert Word document to PDF.

PDF Tools

PDF to Excel

Convert PDF to Excel spreadsheet.

PDF Tools

Excel to PDF

Convert Excel to PDF.

PDF Tools

PDF to PowerPoint

Convert PDF to PowerPoint.

PDF Tools

PowerPoint to PDF

Convert PowerPoint to PDF.

PDF Tools

PDF to JPG

Convert PDF pages to JPG images.

PDF Tools

PDF to PNG

Convert PDF pages to PNG images.

PDF Tools

JPG to PDF

Convert JPG images to PDF.

PDF Tools

HTML to PDF

Convert HTML content to PDF.

PDF Tools

Scan to PDF

Convert scanned images to PDF.

PDF Tools

Edit PDF

Edit text and images in PDF.

PDF Tools

Highlight & Annotate PDF

Add highlights and annotations to PDF.

PDF Tools

Draw on PDF

Draw and sketch on PDF files.

PDF Tools

Watermark PDF

Add watermarks to PDF files.

PDF Tools

Protect PDF

Password protect PDF files.

PDF Tools

Unlock PDF

Remove password from PDF files.

PDF Tools

Sign PDF

Add digital signatures to PDF.

PDF Tools

📝

Document Generators

20 tools

Resume Generator

Create professional resumes.

Document Generators

Invoice Generator

Generate professional invoices.

Document Generators

GST Bill Generator

Generate GST compliant bills.

Document Generators

Salary Slip Generator

Generate employee salary slips.

Document Generators

Rent Receipt Generator

Generate rent payment receipts.

Document Generators

Fee Receipt Generator

Generate fee payment receipts.

Document Generators

Experience Letter Generator

Generate work experience letters.

Document Generators

Relieving Letter Generator

Generate employee relieving letters.

Document Generators

Internship Certificate Generator

Generate internship certificates.

Document Generators

Award Certificate Generator

Generate award certificates.

Document Generators

ID Card Generator

Generate employee ID cards.

Document Generators

Electricity Bill Generator

Generate electricity bills.

Document Generators

Mobile Bill Generator

Generate mobile phone bills.

Document Generators

Broadband Bill Generator

Generate broadband internet bills.

Document Generators

Maintenance Bill Generator

Generate apartment maintenance bills.

Document Generators

Medical Prescription Generator

Generate medical prescriptions.

Document Generators

Hotel Booking Generator

Generate hotel booking confirmations.

Document Generators

Flight Ticket Generator

Generate flight ticket confirmations.

Document Generators

Movie Ticket Generator

Generate movie tickets.

Document Generators

Gym Membership Generator

Generate gym membership cards.

Document Generators

🎭

Fake Generators

5 tools

Fake WhatsApp Chat

Create fake WhatsApp conversations.

Fake Generators

Fake Tweet

Create fake Twitter/X posts.

Fake Generators

Fake Instagram DM

Create fake Instagram messages.

Fake Generators

Fake Facebook Chat

Create fake Facebook conversations.

Fake Generators

Fake Boarding Pass

Create fake boarding passes.

Fake Generators

💰

Finance

13 tools

EMI Calculator

Calculate loan EMI payments.

Finance

Home Loan EMI

Calculate home loan EMI.

Finance

Car Loan EMI

Calculate car loan EMI.

Finance

Personal Loan EMI

Calculate personal loan EMI.

Finance

Credit Card EMI

Calculate credit card EMI.

Finance

Loan Eligibility Calculator

Check your loan eligibility.

Finance

SIP Calculator

Calculate SIP returns.

Finance

PPF Calculator

Calculate PPF maturity amount.

Finance

FD Calculator

Calculate fixed deposit returns.

Finance

Compound Interest Calculator

Calculate compound interest.

Finance

Income Tax Calculator

Calculate income tax liability.

Finance

TDS Calculator

Calculate TDS deductions.

Finance

GST Calculator

Calculate GST amounts.

Finance

🛠️ GeeksPrep Tools

A collection of 200+ free online developer tools. No registration, no ads, just tools that work. Built with ❤️ for developers.

TOOLS

Developer ToolsBuilt for Speed

Developer Tools

Internet Speed Test

JSON Formatter

JSON Compare

JSON Validator

JSON Share

Epoch Converter

XML Formatter

SQL Formatter

CSV to JSON

JSON to CSV

CSV to Excel

Excel to CSV

YAML to JSON

JSON to XML

XML to JSON

Fake Data Generator

Online Notepad

Cron Builder

Regex Tester

Code Minifier

Code Beautifier

Text Diff

String Case Converter

Lorem Ipsum Generator

Word Counter

Markdown to HTML

HTML Entity Encoder

Code Snippet Share

Encoding & Security

Base64 Encoder/Decoder

URL Encoder/Decoder

Base64 to File

JWT Decoder

Hash Generator

UUID Generator

Password Generator

Password Strength Checker

Secret Generator

Binary to Hex

UI & Design

Color Converter

Color Palette Generator

Hex to RGB

Box Shadow Generator

Flexbox Playground

Tailwind Playground

Favicon Generator

OG/Meta Tag Generator

SEO & Network

DNS Lookup

WHOIS Lookup

Ping Checker

SSL Checker

IP Lookup

Port Scanner

Sitemap Generator

Robots.txt Generator

Htaccess Redirect Generator

Canonical URL Checker

Meta Tags Generator

SERP Preview Tool

Website SEO Checker

Website to PDF

API Tester

Utilities

Age Calculator

Date Calculator

IST ↔ UTC Converter

Time Converter

BMI Calculator

Percentage Calculator

Discount Calculator

Currency Converter

Roman Numeral Converter

QR Code Generator

Barcode Generator

Signature Maker

Developer Tools
Built for Speed