Newline / Escape Converter
Convert between literal escape sequences and real newlines, tabs, and quotes.
Public tools
Browse and run public tools without signing in, or open an individual page for examples, versions, and API / MCP usage.
25 tools
SHA-256 Hash
Compute SHA-256, SHA-1, or SHA-512 digests for text.
JSON Formatter / Sorter
Format minified or messy JSON into a readable structure, with key sorting, custom indentation, and tolerant parsing for trailing commas.
QR Code Generator
Generate a scannable QR code from text or a link (auto version v1-v10, byte mode, error-correction level L) as a downloadable SVG image, in pure JS with no external dependencies.
JWT Decoder
Decode JWT header and payload locally and show expiry information.
YAML to JSON
Convert common YAML structures into formatted JSON.
MD5 Digest
Compute an MD5 digest for checksums and deduplication.
Timestamp Converter
Convert Unix timestamps and date strings, auto-detect seconds or milliseconds, and output local time, UTC, and ISO 8601.
URL Encode / Decode
Percent-encode or decode URLs and query parameters, with automatic direction detection.
Base64 Encode / Decode
Convert between Base64 and plain text, auto-detect direction, and handle UTF-8 correctly.
Image Info Reader
Read an uploaded or pasted image (base64 data URL), parse PNG/GIF/JPEG dimensions and byte size in pure JS, and echo the image back for preview and download.
YouTube Info Formatter
Format normalized YouTube metadata as readable text and key-value output.
YouTube Public Info
Read public title, author, thumbnail, and embed metadata without an API key.
YouTube URL Normalizer
Extract a YouTube video ID and produce a canonical URL.
Regex Tester
Test regular expressions against text and list matches and capture groups.
RMB Uppercase
Convert numeric RMB amounts into formal uppercase Chinese currency text.
Markdown Preview
Render a safe subset of Markdown into HTML for quick previews.
AI Summary
Summarize long text into concise bullet points with the AI capability.
AI Ask
Ask an AI model through a declared server-side AI capability.
Translate
Translate text through server-side credentials.
IP Lookup
Look up public IP geolocation through a server-side network whitelist.
UUID Generator
Generate one or more RFC 4122 v4 UUIDs locally.
CSV Table Converter
Convert CSV into Markdown tables or JSON arrays.
Word Counter
Count Chinese characters, English words, lines, paragraphs, and byte length.
Color Converter
Convert between HEX, RGB, HSL, and HSV formats.