Aether Tool is a free collection of 55+ online developer tools — from code formatters and generators to encoders, minifiers, and more. Everything runs in your browser with no signup and no limits.
Share code & text snippets with auto-expire and burn-after-read. No account needed.
Format and beautify messy HTML code — fix indentation and structure instantly.
Minify HTML code — remove comments, whitespace, and reduce file size instantly.
Format and beautify minified or messy CSS code — fix indentation and structure.
Minify CSS code — remove comments, whitespace, and reduce file size instantly.
Format and beautify JavaScript code — powered by js-beautify.
Minify JS code — remove comments, whitespace, and reduce file size.
Obfuscate JS — encode strings, rename variables, add dead code protection.
Format and beautify PHP code — fix indentation and make it readable.
Minify PHP code — remove comments, whitespace, and reduce file size.
Obfuscate your PHP source code. Files processed securely and never stored permanently.
Format, validate, and minify JSON instantly. Spot syntax errors on the fly.
Paste any JSON data and get a valid JSON Schema automatically with types and formats.
Format, beautify, or minify SQL queries — supports all major SQL dialects.
Encode and decode Base64 in one click — supports text and UTF-8.
Encode and decode URLs instantly — convert special characters to percent-encoding.
Generate secure passwords with full control — custom length, patterns, and bulk generate.
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text in one click.
Hash passwords with bcrypt and verify them. Choose cost rounds, all client-side.
Generate cryptographically random UUID v4 in bulk — with formatting options.
Generate QR codes for any text or URL. Customize colors and size, download as PNG.
Upload or paste a QR code image — decode the content instantly. Supports URL, WiFi, vCard.
Generate a QR code for your WiFi network — guests scan to connect instantly.
Generate barcodes in multiple formats — Code 128, EAN-13, UPC-A and more. Download as PNG or SVG.
Compare two texts side by side and spot every difference with color highlighting.
Count words, characters, sentences, paragraphs, and reading time as you type.
Generate placeholder text for your designs — paragraphs, sentences, or words.
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
Test regex patterns in realtime — see matches highlighted and each part explained.
Count tokens and estimate API costs for GPT-4, Claude, Gemini, and more.
Build structured system prompts for GPT, Claude, Gemini with variables and templates.
Pick any color and convert between HEX, RGB, and HSL with visual preview and shades.
Check WCAG AA and AAA compliance — verify your text and background colors are accessible.
Create beautiful linear, radial, and conic gradients visually with presets.
Generate trendy glass and soft UI effects with sliders — copy CSS code instantly.
Create custom CSS shapes by dragging points — polygon, star, arrow, and more.
Build CSS animations visually — presets, live preview, and copy code.
Convert between PX, REM, and EM units instantly with reference table and live preview.
Understand any cron schedule in plain English. See the next 10 scheduled runs instantly.
Build cron schedules visually with dropdowns and presets — no syntax to memorize.
Decode and inspect JSON Web Tokens — see header, payload, expiry, and claims instantly.
Calculate Linux file permissions visually — convert between numeric and symbolic notation.
Convert Unix epoch to human date and back — live clock, multiple formats.
Convert between CSV and JSON instantly — supports custom delimiters and headers.
Convert text into ASCII art with multiple font styles. Copy and paste anywhere.
Validate .env files — detect duplicates, empty values, format errors, and exposed secrets.
Create beautiful code screenshots with themes and styling. Download as PNG for social media.
Write SEO-optimized articles with realtime scoring — keyword density, readability, heading structure, and more.
Build robots.txt visually — control which bots can crawl your site with presets for WordPress and Laravel.
Generate JSON-LD structured data for Google — Article, FAQ, Product, and more.
Generate Apache .htaccess files visually — redirects, HTTPS, caching, security headers, compression.
Clean and optimize SVG files — remove metadata, comments, reduce file size.
Convert SVG to Base64 Data URI for embedding in CSS and HTML instantly.
Convert images to Base64 Data URI — upload PNG, JPG, GIF, WebP for CSS, HTML embedding.
Convert images between PNG, JPG, WebP — adjust quality, resize, batch convert. All client-side.
Compress images up to 90% smaller — adjustable quality, side-by-side preview, batch support. All client-side.
Turn JSON or CSV data into beautiful charts — bar, line, pie, and more.