All Tools
61 toolsPDF Tools
PDF Splitter
Extract specific pages or page ranges from a PDF. Download as a single file or separate pages.
PDF Merger
Combine multiple PDF files into one. Drag to reorder pages before merging.
PDF Editor
Add text & images anywhere on a PDF. Highlight, draw shapes, arrows, freehand. Preview & download instantly.
Image Tools
Image Compressor
Compress JPEG, PNG, WebP images in your browser. 100% local — no upload to any server.
Image Resizer
Resize by pixels, percentage, or target file size. Crop as rectangle, square, circle, app icon, or freehand eraser.
Base64 Image Encoder
Convert images to Base64 data URLs and decode them back. Copy as HTML, CSS, or raw Base64.
Image Color Picker
Hover to zoom in, click any pixel to sample its color. Outputs HEX, RGB, HSL & OKLCH. Builds a shareable palette.
SVG to Image
Convert SVG code to PNG, JPEG, or WebP images. Set dimensions, scale, and background color.
Formatters
JSON Formatter
Validate, format, and minify JSON with syntax highlighting and error detection.
SQL Formatter
Beautify and format SQL queries for MySQL, PostgreSQL, and SQLite dialects.
Markdown Preview
Live side-by-side Markdown editor with instant rendered preview.
XML Formatter
Format, minify, and validate XML with syntax highlighting and element stats.
YAML Formatter
Format and validate YAML, convert between YAML and JSON with live error detection.
HTML Formatter
Format and minify HTML with js-beautify. Adjustable indent, attribute wrapping, compression stats.
CSS Formatter
Format and minify CSS — removes comments, collapses whitespace, shows compression savings.
Code Formatter
Format JS, TS, JSX, CSS, HTML, JSON, Markdown using Prettier — the industry standard.
Decoders & Encoders
JWT Decoder
Decode and inspect JWT tokens — header, payload, expiration, and claims.
Base64 Encoder
Encode and decode Base64 strings and files instantly in your browser.
URL Encoder & Parser
Encode/decode URLs and parse all components — protocol, path, query params.
HTML Entity Encoder
Encode special characters to HTML entities and decode them back.
Generators
UUID Generator
Generate UUID v4 (random) and v1 (time-based) IDs in bulk instantly.
Hash Generator
Generate SHA-1, SHA-256, and SHA-512 cryptographic hashes using Web Crypto API.
QR Code Generator
Generate QR codes from any URL or text. Customize colors and download as PNG.
Password Generator
Generate cryptographically strong passwords with customizable rules.
Lorem Ipsum Generator
Generate placeholder text by words, sentences, or paragraphs for mockups.
CSS Shadow Generator
Build box-shadow and text-shadow CSS visually with live preview.
Gradient Generator
Build linear, radial, and conic CSS gradients with live preview and presets.
Border Radius Visualizer
Design CSS border-radius visually. Control all corners, pick presets, copy CSS.
Random Data Generator
Generate realistic fake data — names, emails, UUIDs. Custom schemas, export JSON or CSV.
Gitignore Generator
Select languages, frameworks, and editors to generate a .gitignore file instantly.
Color Palette Generator
Generate harmonies, Tailwind-style scales, tints & shades. Export CSS vars, JSON, Sass.
Favicon Generator
Create favicons from text, emoji, or image. All sizes: 16, 32, 48, 180, 192, 512px.
README Generator
Generate a professional README.md — fill details, toggle sections, preview & download.
Changelog Generator
Build a CHANGELOG.md following Keep a Changelog. Add versions, categorize, export Markdown.
License Picker
Choose the right open-source license. Compare MIT, Apache, GPL, BSD and download.
Converters
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK formats with a visual picker.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa across timezones.
Number Base Converter
Convert numbers between Binary, Octal, Decimal, and Hexadecimal simultaneously.
CSV ⇔ JSON Converter
Convert CSV to JSON and back. Custom delimiters, header detection, table preview.
px / rem / em Converter
Convert between px, rem, and em CSS units with a full reference table.
Timezone Converter
Convert times across world timezones with a live clock and meeting planner.
Markdown ⇔ HTML
Convert Markdown to HTML and HTML back to Markdown. GFM, tables, code blocks, preview.
Testers & Clients
Regex Tester
Test regular expressions live with real-time match highlighting and group capture display.
Text Diff Viewer
Compare two blocks of text and visualize additions, deletions, and unchanged lines.
Cron Expression Parser
Parse and describe cron expressions in plain English with next run times.
cURL / HTTP Client
Build and send HTTP requests like Postman. Generate cURL commands instantly.
GraphQL Client
Run GraphQL queries and mutations. Supports variables, auth, and generates cURL.
gRPC Client
Generate grpcurl & buf curl commands. List services, describe methods, pass metadata.
WebSocket Tester
Connect to any WebSocket server, send messages, and view real-time events live.
SSE Tester
Connect to Server-Sent Events streams and inspect live events with type, data, and ID.
HTTP Status Codes
Complete reference for all HTTP status codes — searchable, filterable by category.
Contrast Checker
Check WCAG AA and AAA accessibility contrast ratios between foreground and background colors.
JSON Table Viewer
Paste a JSON array and view it as a sortable, searchable table. Export to CSV.
CORS Tester
Test CORS headers on any URL. Real request, inspects Access-Control headers, fix guide.
IP & DNS Lookup
Look up any IP for location, ISP, ASN. Query A, MX, TXT, NS DNS records via Google DNS.
npm Package Size
Check the gzipped and minified bundle size of any npm package via Bundlephobia.
Chart Builder
Build bar, line, pie, radar charts with Chart.js. Paste CSV, customize, export PNG.
Backend Repo Tree
Connect a GitHub repo and visualize every API endpoint as a full end-to-end function call chain with file names.
Text Tools
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time.
Case Converter
Convert text between camelCase, snake_case, PascalCase, kebab-case, and more.
Markdown Preview
Live side-by-side Markdown editor with instant rendered preview.
String Escape / Unescape
Escape strings for JSON, URL, HTML, RegEx, Unicode, Base64, and SQL — live as you type.
HTML → JSX Converter
Convert HTML to React JSX — class→className, style strings→objects, self-closing tags.
SVG Optimizer
Clean and minify SVG — removes comments, metadata, empty groups. Live side-by-side preview.
Frequently Asked Questions
Everything you need to know about Convsta