🛠️ Online-Tool
Entwickler-Tools, die nur im Browser funktionieren. Völlig kostenlos, keine Registrierung erforderlich, keine Datensendung an den Server.
📊 Datentransformation und Formatierung 14
JSON Formatter
Format, validate, minify
YAML ⇔ JSON
Two-way conversion
CSV ⇔ JSON
Delimiter & header row
CSV Cleaner
Dedupe, sort, blanks, extract cols
XML ⇔ JSON
Attributes, CDATA, array auto
JSON Diff
Structural compare with JSON Pointer
JSONPath
$ queries · filters · recursive
TOML ⇔ JSON / YAML
Hugo / Cargo / pyproject · two-way
JSON → Types
TS / PHP / Python / Go / Rust
JSON → TypeScript
interface / type, union infer, nest split
JSON Schema
Validation + error location
cURL ⇄ fetch
13 languages
Base64
Encode / decode
URL Encode
encodeURIComponent
String Escape
HTML / JS / JSON / Unicode / SQL
🖼️ Bild und Medien 13
Image Converter
PNG ⇄ WebP ⇄ JPEG ⇄ AVIF
Image Mosaic / Blur
Region select · mosaic · blur · black
Image BG Remover
White → transparent PNG · tolerance
Image Resize
Width / height, batch
Image Crop
Drag · 1:1 / 4:3 / 16:9
Image Rotate / Flip
90° · flip · free angle
Image Watermark
Text · 9 positions · tile
Image → Base64
Drag & drop
EXIF
GPS, date, camera + strip
SVG Optimizer
Strip metadata · JSX output
QR Code
URL / WiFi / vCard / SVG · PNG
Color Converter
HEX / RGB / HSL / HSV
Color Palette
Top 5/10/16 from image
🛡️ Sicherheit und Authentifizierung 7
🤖 KI-Entwicklungsunterstützung (Claude Code / Cursor / ChatGPT) 10
AGENTS.md / CLAUDE.md Generator
24 stack templates + 28 rules × 6 formats
Repo Snapshot for AI
tree → LLM-ready Markdown
LLM Tokens + Cost
Claude / GPT / Gemini 18 models
Prompt Library
30+ prompt templates
JSON Schema → Tool Use
Claude / OpenAI / Gemini 3 formats
Diff → Conventional Commit
auto-gen + AI prompt
MCP Server Boilerplate
TS / Python + 4 presets
RAG Text Chunker
4 strategies for embeddings
Embeddings Pricing
15+ models
AI Image Detector
ChatGPT / Midjourney / SD / ComfyUI 16+
📝 Code·Text 17
Regex Tester
Match highlight & groups
Text Diff
Line-by-line compare
Markdown
Real-time HTML
Markdown Composer
.md download · templates
Cron Expression
Plain English + next runs
SQL Formatter
Beautify / minify
HTML/CSS/JS
Minify / beautify
Case Converter
camelCase / snake_case / kebab
Lorem Ipsum
English / Japanese
Line Endings & Encoding
LF / CRLF / BOM / UTF-8 / SJIS
OpenAPI → cURL
cURL for every endpoint
Crontab → Human
5 langs + next runs
Excel Paste Formatter
TSV · formula escape
Markdown TOC Generator
h1–h6 · GitHub slug · MD/HTML/plain
HTML Paste Preview
Sandbox iframe · widths · email
Mermaid Live Preview
flowchart / sequence / gantt · SVG/PNG
robots.txt Tester
14 crawlers
🌐 Netzwerk, Numerisch, Generieren 13
Cron Parser
Next 10 runs
CIDR / Subnet
IPv4 / IPv6
Punycode / IDN
IDN ⇄ xn-- (RFC 3492)
Number Base
2 / 8 / 10 / 16
Timestamp
Unix ⇔ ISO 8601
Timezone Converter
World clock · DST · 8 cities
Phone Formatter
Intl / E.164 · 30+ countries
Phone Number Regex Builder
30 countries · E.164/Intl/Mobile · JS/PHP/Python/Ruby/Go/Java
UUID v4
Bulk 1–100
Test Data
CSV / JSON / SQL
Byte Converter
MB / MiB / GB / GiB
HTTP Status
Lookup & fix
Sales Tax Calculator
In/excl tax · 10%/8% · batch
Date Calculator
Diff · add/sub · workdays · age
🔍 SEO · Metadaten 5
robots.txt Generator
20+ crawlers · AI presets
sitemap.xml Generator
hreflang · image/video
hreflang Generator
International SEO · x-default
ads.txt Generator
AdSense · Amazon · SSPs
JSON-LD Generator (schema.org)
9 structured data types
llms.txt Generator
LLM crawler catalog · sitemap import
⚙️ Server · DevOps 8
.htaccess Generator
Apache: HTTPS / HSTS / gzip / WP
nginx.conf Generator
HTTP/2 / TLS / PHP-FPM / proxy
docker-compose Generator
6 presets · multi-service
GitHub Actions Generator
CI/CD workflow YAML
.env → docker-compose
environment block · secret warn
.env.example Generator
Sanitize real .env safely
.gitignore / .dockerignore Generator
30+ stacks (Node/Py/Go/Rust/Java/PHP) + IDE + OS combined
Web App Manifest Generator
PWA manifest.json + HTML tag
🎨 Design-Generator 9
OGP Image Generator
1200x630 · gradient presets
Code Screenshot
Syntax highlight + theme
Favicon Generator
All sizes + manifest ZIP
PDF Merge / Split / Reorder
Multiple PDFs · drag reorder
PDF Text Extractor
Per-page · copy · TXT
OCR — Image/PDF to Text
Tesseract 5 · jpn + eng
CSS Gradient
linear / radial / conic
CSS box-shadow
Stack layers · presets
CSS cubic-bezier
SVG editor · animation
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