Free Online Tools for JSON, PDF, Images, Text & Developers
Use free browser-based tools for JSON formatting and validation, PDF and image processing, text utilities, developer tasks, DNS and network checks, unit conversion, and construction calculations.
JSON Tools (6)
Developer Tools (27)
SQL Formatter
Format SQL queries for easier reading.
JavaScript Formatter
Beautify common JavaScript source code.
Markdown Formatter
Normalize Markdown spacing and lists.
HTML Minifier
Minify HTML in your browser.
CSS Minifier
Minify CSS in your browser.
JavaScript Minifier
Minify common JavaScript source code.
JWT Decoder
Decode JWT header and payload locally.
Hash Generator
Generate SHA-256, SHA-384 and SHA-512 hashes.
Color Converter
Convert common HEX and RGB colors to HSL.
User Agent Parser
Inspect browser and operating-system details from a user-agent string.
JSON Formatter
Format and beautify JSON source.
JSON Validator
Validate JSON syntax.
JSON Minifier
Minify JSON.
HTML Formatter
Format HTML.
CSS Formatter
Format CSS.
Regex Tester
Test regular expressions.
Unix Timestamp Converter
Convert Unix timestamps.
UUID Generator
Generate UUID v4 values.
Password Generator
Generate secure random passwords.
JSON to Java
Generate Java entity classes from JSON.
JSON to Go
Generate Go structs from JSON.
Symmetric Crypto
AES/DES/TripleDES text encryption.
Contrast Checker
Check text color contrast against WCAG AA/AAA standards.
CSS Gradient Generator
Design CSS linear/radial gradients visually and copy the code.
Cron Parser
Parse or generate cron expressions with plain-English explanations.
JSON Schema Validator
Validate JSON against a JSON Schema with precise error paths.
Markdown Preview
Live-render Markdown to HTML with GFM support.
Text Tools (11)
Text Diff
Compare two blocks of text line by line.
Line Sorter
Sort text lines alphabetically.
Whitespace Remover
Trim blank lines and surrounding whitespace.
Text Extractor
Extract URLs, email addresses and numbers from text.
Lorem Ipsum Generator
Generate placeholder paragraphs.
Word Counter
Count words and characters.
Text Case Converter
Convert text case.
Remove Duplicate Lines
Remove duplicate lines.
Pinyin Converter
Convert Chinese text to pinyin.
RMB Uppercase
Convert numbers to RMB uppercase.
Random Picker
Pick random winners from a list with fair animation.
Network Tools (7)
DNS Lookup
Look up DNS A records using DNS over HTTPS.
MX Lookup
Look up mail exchange records using DNS over HTTPS.
HTTP Status Checker
Check HTTP status when the target permits browser CORS.
URL Parser
Parse URLs, paths and query parameters.
HTTP Headers Checker
Inspect response headers when CORS permits access.
What Is My IP?
Find your public IP address.
Domain Whois Lookup
Validate domains, jump to Whois/ICP.
Image Tools (10)
JPG to PNG
Convert JPG images to PNG locally.
PNG to JPG
Convert PNG images to JPG locally.
WebP Converter
Convert images to WebP locally.
Image Cropper
Crop images in your browser.
Image Rotator
Rotate images by 90, 180 or 270 degrees.
Image Metadata Viewer
View basic image file and dimension metadata.
Image Compressor
Compress images locally.
Image Resizer
Resize images locally.
QR Code Generator
Generate QR codes from text or URLs.
QR Code Decoder
Decode QR codes from images in your browser.
PDF Tools (8)
PDF Merger
Merge multiple PDF files in your browser.
PDF Splitter
Extract selected PDF pages into a new file.
PDF Compressor
Re-save a PDF with object streams; size reduction is not guaranteed.
JPG to PDF
Convert JPG or PNG images into a PDF.
PDF to JPG
Render PDF pages as JPG images in your browser.
PDF Page Extractor
Extract selected PDF pages.
PDF Page Counter
Count pages in a PDF.
PDF Rotator
Rotate every PDF page by a selected angle.
Construction Tools (18)
Concrete Calculator
Estimate concrete volume from length, width and depth.
Concrete Volume Calculator
Calculate concrete volume in cubic metres.
Rebar Weight Calculator
Estimate reinforcement bar weight using diameter, length and quantity.
Steel Weight Calculator
Estimate steel plate or section weight using dimensions.
Slab Weight Calculator
Estimate slab self-weight from volume and density.
Beam Weight Calculator
Estimate reinforced concrete beam self-weight.
Column Weight Calculator
Estimate column self-weight.
Excavation Calculator
Calculate excavation volume.
Brick Calculator
Estimate brick quantity from wall area and brick face size.
Block Calculator
Estimate block quantity from wall area and block face size.
Tile Calculator
Estimate tile quantity including waste.
Cement Calculator
Estimate cement mass from concrete volume and cement rate.
Sand Calculator
Estimate sand volume from concrete volume and mix rate.
Gravel Calculator
Estimate gravel volume from concrete volume and mix rate.
Area Calculator
Calculate rectangular area.
Volume Calculator
Calculate rectangular volume.
Concrete Bag Calculator
Estimate bags of concrete from volume.
Paint Calculator
Estimate paint volume from room dimensions, coats and coverage rate.
Encoding Tools (2)
Calculator Tools (7)
Percentage Calculator
Calculate percentages.
Unit Converter
Convert common length units.
Mortgage Calculator
Estimate monthly mortgage payment, total interest and payoff schedule.
Age Calculator
Calculate your exact age in years, months and days from date of birth.
Date Calculator
Calculate days between dates, add/subtract days, and count business days.
Time Zone Converter
Convert time between time zones with automatic DST handling.
Compound Interest Calculator
Calculate compound interest growth with optional monthly contributions.
Simple tools, useful results
DailyWebKit focuses on one task per page. Browser-local tools are designed to process input on your device where practical, while network tools depend on browser security and the availability of the requested service.
Guides & How-to
- How to Create a Strong Password (That You Remember)
- How to Write a Cron Expression (with Examples)
- JSON vs YAML: Which Format Should You Use?
- How to Decode a QR Code from a Screenshot or Photo
- Markdown Syntax Cheat Sheet (GitHub Flavored)
- How to Calculate Percentage: Formulas & Examples
- How Compound Interest Works (With Examples)
- How Much House Can I Afford? Rules & Calculator
- How to Read a Mortgage Amortization Schedule