All tools
52 tools live across 12 categories. More shipping weekly.
JSON6 tools
Format, validate, transform, diff JSON
JSON Diff
Compare two JSON documents and see added, removed, and changed fields — privately.
JSON Escape / Unescape
Escape and unescape JSON strings in your browser — privately.
JSON Formatter
Format, validate, and minify JSON in your browser — privately.
JSON Minifier
Compress JSON for production — strip whitespace, comments, and trailing commas.
JSONPath Evaluator
Query JSON documents with JSONPath expressions — privately, in your browser.
JSON ↔ YAML Converter
Convert JSON to YAML and YAML to JSON in your browser — privately.
Encoding6 tools
Base64, URL, HTML entities, hex
Base32 Encode / Decode
Encode and decode Base32 strings in your browser — RFC 4648, RFC 4648-hex, and Crockford alphabets.
Base64 Encode / Decode
Encode and decode Base64 strings in your browser — UTF-8 safe, privately.
Data URL Parser & Builder
Parse, build, and inspect RFC 2397 data URLs — inline images, fonts, and text in your browser.
Hex Encoder / Decoder
Convert between text and hexadecimal in your browser — UTF-8 safe, privately.
HTML Entities Encode / Decode
Encode and decode HTML entities in your browser — privately.
URL Encode / Decode
Percent-encode and decode URLs, query params, and form values — in your browser.
Text10 tools
Diff, case convert, lorem, slugify, sort
Case Converter
Convert text between camelCase, snake_case, PascalCase, kebab-case and more — instantly.
CSV to JSON Converter
Convert CSV or TSV into JSON in your browser — RFC 4180 parser with auto-delimiter detection and type coercion.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text — words, sentences, or paragraphs.
Markdown Preview
Live Markdown renderer with GFM, tables, task lists, and sanitized HTML — right in your browser.
Slugify
Convert strings to URL-safe slugs — Unicode-aware, client-side, zero deps.
Sort Lines
Sort, deduplicate, trim, and reorder lines of text with natural-number and case-insensitive ordering.
Text Diff
Compare two texts side-by-side with line and word-level highlighting — privately.
Word Counter
Count characters, words, lines, paragraphs, reading time.
XML Formatter
Format, validate, and pretty-print XML in your browser — privately.
YAML Formatter
Format, validate, and lint YAML in your browser — privately.
Time5 tools
Unix, timezone, ISO 8601, cron, dates
Cron Expression Parser
Explain cron schedules and preview the next 10 runs.
Date Difference Calculator
Calculate the difference between two dates in every unit.
ISO 8601 Parser
Parse and format ISO 8601 dates, durations, and intervals.
Timezone Converter
Convert between timezones with DST and multi-target support.
Unix Timestamp Converter
Convert between Unix epoch and human-readable dates
Crypto6 tools
Hashing, password, UUID, random
JWT Encoder
Sign and encode JSON Web Tokens — HS256, HS384, HS512.
MD5 Hash Generator
Compute MD5 digests and HMAC-MD5 in your browser — pure JavaScript, no upload.
NanoID Generator
Generate URL-safe unique IDs with configurable length and alphabet.
Password Generator
Strong, random passwords and passphrases with entropy.
SHA-256 Hash
Compute SHA-256, SHA-1, SHA-384, SHA-512 hashes in your browser — privately.
UUID Generator
Generate UUID v1, v4, v7 — bulk and validated.
Regex2 tools
Test, build, explain regular expressions
Network7 tools
Uptime check, DNS, my IP, URL, HTTP status, user agent
DNS Lookup
Resolve any hostname to A, AAAA, MX, TXT, NS, CNAME, SOA, and CAA records — live, via Cloudflare DoH.
HTTP Status Codes
HTTP Status Code Reference — search every IANA code with retry guidance.
IPv4 CIDR Calculator
Subnet calculator — parse CIDR, split, supernet, and test containment in your browser.
Is My Website Alive?
Check if a site is up in under a second — TCP handshake, HTTP status, SSL expiry, response time. No install, no account.
What's My IP?
See your public IP address, user agent, and connection details — instantly, no tracking.
URL Parser
Break URLs into parts — scheme, host, port, path, query, fragment, IDN, and PSL.
User Agent Parser
Parse Browser User-Agent Strings — browser, OS, device, and bot detection.
Color2 tools
Convert, contrast, palettes
Image0 tools
Base64, convert, optimize, QR
No tools shipped in this category yet.
Code5 tools
SQL, chmod, JWT, syntax helpers
Chmod Calculator
Unix file permissions converter — octal, symbolic, and checkbox grid, always in sync.
JWT Decoder
Decode JSON Web Tokens — header, payload, signature.
MongoDB Query Builder
Build MongoDB find() queries visually — generate shell, Node driver, Mongoose, and pymongo code in one click.
Number Base Converter
Convert numbers between binary, octal, decimal, and hex — BigInt-safe, with bitwise ops.
SemVer Parser
Parse, compare, increment, and range-check Semantic Versioning strings.
AI3 tools
Token count, LLM cost, prompt diff
Anthropic Messages API
Send prompts to Claude from your browser — streaming, system prompts, your key stays local.
HTTP Client
Send REST requests from your browser — import & export curl.
OpenAI Responses API
Test OpenAI's Responses API from your browser — streaming, structured outputs, your key stays local.
Misc0 tools
Everything else useful
No tools shipped in this category yet.