39 tools, one app
Everything runs locally, in the same window, with no per-tool setup. Search the sidebar in the app, or browse by category here.
# formatters & text
JSON Formatter
Pretty-print, minify, and validate JSON.
XML / CSV Formatter
Pretty-print XML and view CSV as a table.
SQL Formatter
Beautify minified SQL into readable, indented output.
Markdown Previewer
Live-rendered Markdown as you type.
JSON ↔ YAML / TOML
Convert between JSON, YAML, and TOML.
Regex Tester
Match highlighting, capture groups, and a pattern cheat sheet.
Diff Tool
Line-by-line diff between two blocks of text.
Case Converter
camelCase, snake_case, kebab-case, and more.
Text Utilities
Sort, dedupe, normalize whitespace, count words and lines.
Encode / Decode
Base64, URL encoding, and HTML entities.
Log Parser / Grep
Filter multi-line logs by pattern, with a most-repeated-lines view.
String Escape / Unescape
JSON, shell, SQL, and regex escaping in one place.
JSON Diff
Structural diff by key/value — ignores reordering and formatting.
JSON Schema Validator
Validate a JSON document against a JSON Schema.
Scratchpad
A local, multi-note notepad that never leaves your machine.
# generators
Hash / UUID Generator
MD5, SHA-1/256/512, and UUID v4 generation.
Fake Data Generator
Names, emails, addresses, and more for seeding test data.
QR Code Generator
Text or URL to a QR code, exportable as PNG.
Favicon Generator
One image in, a full set of favicon sizes and an .ico out.
# security
JWT Decoder
Inspect header, payload, and signature claims.
X.509 Certificate Decoder
Issuer, subject, validity, and SANs from a pasted PEM cert.
Password Strength Checker
Entropy and crack-time estimates, plus a strong-password generator.
Certificate / CSR Generator
Generate a self-signed cert or CSR — the private key never leaves your device.
# network & config
API Request Tester
Compose and send HTTP requests on demand — the one deliberate exception to zero network calls.
URL Parser / Builder
Break a URL into fields, or build one from scratch.
Subnet / CIDR Calculator
Network address, broadcast, and usable host range from an IP + CIDR.
Cron Explainer
Human-readable explanation of a cron expression, plus next run times.
dotenv Diff & Validator
Compare two .env files for missing, extra, or differing keys.
Network Port Reference
Searchable lookup of common ports and what runs on them.
cURL ↔ Request Builder
Parse a cURL command into its parts, or generate one from a request.
System Info
Platform, architecture, hostname, and locale — read locally.
# converters & media
Timestamp Converter
Unix timestamps to dates and back, in seconds or milliseconds.
Number Base Converter
Binary, octal, decimal, and hexadecimal conversion.
Color Tools
HEX, RGB, HSL, and CMYK conversion with a visual picker.
Color Palette Extractor
Dominant colors from an image via k-means clustering.
QR Code Reader
Decode a QR code image back to text.
Hex / Binary File Inspector
Hex dump and magic-byte file type detection for any file.
Base64 File Encoder
Encode any file to base64 or a data URI, and decode back.