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Developer Tools
83+ free, privacy-focused utilities. All of them run entirely in your browser — no data ever leaves your device.
Text & Code
22 toolsBase64 Encoder/Decoder
Convert text or files to and from Base64 encoding format.
JSON Formatter
Beautify, validate, sort keys, or minify JSON data instantly.
JSON Minifier
Quickly strip whitespace to reduce JSON file size.
JSON Tree Viewer
Visualize JSON structure with expandable tree and search functionality.
YAML ⇄ JSON Converter
Convert between YAML and JSON formats with formatting options.
URL Encoder / Decoder
Encode or decode URL components with automatic real-time transformation.
Text & File Diff Checker
Compare two texts or files with line-by-line highlighted differences.
Text to Mindmap
Transform hierarchical text into beautiful, interactive mindmaps with custom layouts and themes.
Regex Tester
Test and debug regular expressions in real-time with match highlighting, capture groups, and common patterns.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files. Compare and verify hashes.
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words. Copy as plain text or HTML.
Markdown Preview
Write and preview Markdown in real-time. Supports headers, lists, code blocks, tables, and more.
CSV to JSON Converter
Convert between CSV and JSON formats. Supports custom delimiters, headers, and quoted fields.
JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, claims, and check expiration status.
Text Case Converter
Convert text between camelCase, snake_case, PascalCase, kebab-case, UPPER, lower, Title Case, and more.
JSON to TypeScript
Convert JSON objects to TypeScript interfaces automatically. Handles nested objects, arrays, and unions.
Word & Character Counter
Count words, characters, sentences, paragraphs. Estimate reading time and find keyword density.
HTML Entity Encoder/Decoder
Encode and decode HTML entities. Supports named, numeric, and hex entity references.
SQL Formatter
Format and beautify SQL queries with syntax highlighting. Customizable indentation and keyword casing.
JSON Diff
Compare two JSON objects and see added, removed, and modified properties highlighted in a tree view.
Markdown Table Generator
Create Markdown tables visually with a spreadsheet editor. Set alignment and import from CSV.
Line Sorter & Deduplicator
Sort lines alphabetically or by length, remove duplicates, trim whitespace, shuffle, and filter blank lines.
Utilities
21 toolsCron Schedule Generator
Create and understand cron expressions with next execution preview.
What Is My IP Address
See your public IP address, browser, operating system, device type, and full user agent string.
PDF Compressor
Reduce PDF file size with adjustable quality presets, entirely in your browser.
PDF Splitter
Extract page ranges or split a PDF into individual pages or fixed-size chunks.
PDF Page Rotator
Rotate specific pages or an entire PDF with a live thumbnail preview.
Color Contrast Checker
Check WCAG AA/AAA contrast compliance between text and background colors, with a live preview.
PDF Merger
Combine multiple PDF files into one. Reorder pages and merge instantly in your browser.
PDF to Images
Extract all pages from PDF as individual PNG or JPEG images with quality control.
Images to PDF
Convert multiple images into a single PDF document. Drag to reorder pages easily.
YouTube Thumbnail Fetcher
Download YouTube video thumbnails in multiple resolutions instantly.
PDF Annotator
Annotate PDFs with text, images, drawings, and signatures online.
Password Generator
Generate strong, secure random passwords with customizable length, characters, and strength indicator.
QR Code Generator
Create custom QR codes for URLs, text, email, WiFi, and more. Download as PNG or SVG.
Color Picker & Converter
Pick colors and convert between HEX, RGB, and HSL formats. Generate palettes and complementary colors.
UUID Generator
Generate random UUID v4 identifiers. Bulk generate, copy, and download. Supports uppercase and no-hyphen formats.
Unix Timestamp Converter
Convert Unix timestamps to dates and vice versa. Supports seconds, milliseconds, and multiple formats.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal. Custom bases 2-36 with bit visualization.
Meta Tag Generator
Generate HTML meta tags for SEO, Open Graph, and Twitter Cards. Preview Google and social media appearance.
Open Graph Preview
Preview how your website looks on Facebook, Twitter, LinkedIn, Slack, and Discord before sharing.
Chmod Calculator
Calculate Unix file permissions interactively. Convert between numeric (755) and symbolic (rwxr-xr-x) notation.
Unit Converter
Convert between length, weight, temperature, area, volume, speed, data, and time units instantly.
Calculators
16 toolsEMI Calculator
Calculate monthly loan EMI, total interest, and amortization schedule for home, car, or personal loans.
GST Calculator
Add or remove GST from an amount with CGST/SGST/IGST breakdown for all standard slabs.
Percentage Calculator
Find a percentage of a number, percentage change, or percentage increase/decrease.
Date Difference Calculator
Calculate the exact years, months, and days between two dates, plus total days and weeks.
Age Calculator
Calculate exact age in years, months, and days, with total days lived and next birthday countdown.
Simple & Compound Interest Calculator
Calculate simple or compound interest with daily, monthly, quarterly, or annual compounding.
SIP Calculator
Estimate the maturity value of a monthly systematic investment plan (SIP).
Mortgage Calculator
Estimate your monthly mortgage payment including property tax, insurance, and PMI.
FD & RD Calculator
Calculate maturity value and interest earned on a Fixed Deposit or Recurring Deposit.
CAGR Calculator
Calculate the compound annual growth rate of an investment between its initial and final value.
Tip Calculator
Calculate tip amount and split the bill evenly between any number of people.
Discount Calculator
Calculate the final price after one or two stacked discounts.
BMI Calculator
Calculate Body Mass Index in metric or imperial units with weight category.
Retirement Corpus Calculator
Estimate your retirement savings from current savings and monthly contributions, adjusted for inflation.
Loan Comparison Calculator
Compare EMI, total interest, and total payment between two loan offers side by side.
Salary Hike Calculator
See your new salary and the real, inflation-adjusted value of your raise.
Image Tools
14 toolsImage Editor
Edit images with color adjustments, creative presets, and special effects.
Image Resizer & Cropper
Resize and crop images to rectangle or circle with manual controls.
Circular Image Cropper
Crop images into perfect circular shape with adjustable radius.
Camera Capture & Crop
Capture photos from your device camera and crop into circles.
Image Compressor
Compress images with quality control and batch processing up to 10 files.
Image Format Converter
Convert images between PNG, JPEG, WebP, and AVIF. Batch convert up to 10 files with quality control.
Image Thumbnail Generator
Generate image thumbnails in multiple preset sizes or custom dimensions for social media and websites.
Favicon Generator
Generate favicons in multiple sizes from any image. Download PNG favicons for your website.
Image to Base64
Convert images to Base64 strings and data URIs. Copy as raw Base64, HTML img tag, or CSS background.
Screenshot Beautifier
Make screenshots beautiful with gradient backgrounds, shadows, rounded corners, and macOS-style window frames.
Social Media Image Resizer
Resize images for Instagram, Twitter, YouTube, Facebook, LinkedIn, Pinterest, and TikTok with one click.
Color Palette from Image
Extract dominant colors from any image. Get HEX, RGB, HSL values and export as CSS variables or Tailwind config.
Watermark Generator
Add text watermarks to images. Customize font, opacity, rotation, and position. Supports tiled patterns.
Placeholder Image Generator
Generate placeholder images with custom dimensions, colors, and text for mockups and development.
CSS Tools
6 toolsCSS Gradient Generator
Create beautiful linear and radial CSS gradients visually. Multiple color stops, presets, and live preview.
CSS Box Shadow Generator
Build CSS box shadows visually with multiple layers, inset shadows, and preset styles.
CSS Flexbox Generator
Build Flexbox layouts visually. Configure direction, alignment, wrapping, gap, and individual item properties.
CSS Grid Generator
Create CSS Grid layouts visually. Set columns, rows, gaps, and alignment with live preview and presets.
Border Radius Generator
Create CSS border-radius visually. Set individual corners, advanced organic shapes, and copy CSS instantly.
SVG Wave Generator
Create beautiful SVG wave shapes for section dividers. Customize layers, colors, and styles. Copy SVG code.
Content Creator
4 toolsFancy Text Generator
Generate stylish Unicode text for social media bios. Bold, italic, cursive, gothic, bubble, and more styles.
Twitter/X Thread Formatter
Split long text into tweet-sized chunks with auto-numbering. Preview your thread before posting.
Quote Image Maker
Create beautiful quote cards for social media with gradient backgrounds, custom fonts, and sizes.
Emoji Picker
Browse, search, and copy 300+ emojis. View Unicode codes, shortcodes, and HTML entities.
Why Use AppsFactory Developer Tools?
AppsFactory provides a comprehensive suite of free online developer tools designed to streamline your workflow. Whether you're encoding Base64, formatting JSON, editing images, or comparing text files, our tools offer:
- Complete Privacy: All processing happens in your browser—no data is sent to servers
- No Registration Required: Start using tools immediately without creating an account
- Always Free: All tools are completely free with no hidden costs or premium tiers
- Modern Interface: Clean, intuitive design with dark mode support
- Mobile Friendly: Responsive design works perfectly on all devices
- Actively Maintained: New tools and calculators added regularly to expand what you can do
Popular Developer Tools
Our most-used tools include the JSON Formatter for beautifying and validating JSON data,Image Resizer for quick image optimization, Base64 Encoder for encoding files,URL Encoder for safe URL parameter encoding, and Text Diff Checker for comparing code changes.
Built for Developers, By Developers
Created by Gorav Singal, AppsFactory is developed with love ❤️ to provide practical utilities that solve real developer problems. Each tool is crafted with attention to detail, performance, and user experience.