The toolbox
35 local tools and 11 opt-in AI tools across 8 categories. Local tools run on-device, instant, and they work offline.
Format, minify, validate and query JSON, collapsible tree view, JSONPath search and type-based syntax coloring.
Live GitHub-Flavored Markdown preview with HTML source view and export to PDF.
Render HTML live in a sandboxed frame and open it in your system browser.
Encode text to Base64 and decode it back, UTF-8 and URL-safe variants.
Split a JSON Web Token into header, payload and signature, and verify signatures (HS/RS/PS/ES) fully offline.
Decode any JSON Web Key or JWKS, convert between PEM and JWK (RSA & EC) and grab the RFC 7638 thumbprint, 100% on-device.
Convert any file (image, PDF, ZIP, text…) to Base64 or back, with MIME detection and smart preview.
Compute MD5, SHA-1/256/384/512 in parallel for text or files, and compare against a known hash.
Produce the keyed-hash signature of a message, for webhook verification, API signatures and JWT key tests.
Hash and verify passwords with bcrypt, configurable cost, with live cost estimation.
Generate test data, Lorem Ipsum text, names, emails, addresses, phones, IBAN and credit cards.
Configurable secure passwords, passphrases, PINs and license keys with instant character sets.
Generate unique identifiers, UUID v1/v4/v7, NanoID and ULID, in bulk.
Generate RFC-compliant MAC addresses for testing, OUI presets, separators and randomization modes.
Generate IPv4, IPv6 or IPv4+CIDR addresses for test data, with reserved-range awareness.
Turn text, URLs or Wi-Fi credentials into QR PNGs, error-correction levels and color picker.
Generate placeholder PNGs on-device, wireframe/mockup images with zero network calls.
Two-way conversion between Unix seconds/ms, ISO 8601 and human-friendly, every format at once.
Convert a time across multiple IANA zones with DST and sub-hour offsets, live mode included.
Translate cron expressions into human language in 7 languages and show the next run times.
See the difference between two texts side-by-side or inline, with line-level coloring.
Sort lines (including natural sort) and remove duplicates, locale-aware.
Encode or decode text with backslash escape sequences (\n, \xHH, \uHHHH).
Validate an IBAN with mod-97 checksum and show its country, check digits and structure.
Turn text into a URL/filename-friendly slug, with correct transliteration for Turkish, German, Polish and more.
Test regular expressions live, match highlighting, capture groups and replace mode.
Every count, byte and codepoint plus invisible/suspicious characters, spot Trojan Source attacks by eye.
Convert a JSON document to YAML with indent control.
Convert a YAML document to JSON with error handling.
Pick a color and convert it to 9 formats plus 8 code presets (CSS, Swift, Tailwind…).
Convert between binary, octal, decimal and hex, BigInt support and bit-width modes.
Convert text into 13 casing styles at once (camelCase, snake_case, kebab-case…).
Break a URL into parts, inspect and edit query parameters, then rebuild it live.
A searchable reference, RFC 9110 + WebDAV + extensions, with RFC source notes.
Compute network, broadcast, mask, host range and more from a CIDR, IPv4 & IPv6, with in-range testing.
Explain error messages and stack traces in plain language, cause and how to fix.
Explain what a snippet does, its flow and the points to watch.
Generate realistic, context-appropriate JSON/CSV/SQL test data from a schema.
Generate a regex from a description, pick your flavor (PCRE, Python, Go/RE2…).
Turn a schedule described in natural language into a cron expression, verified locally.
Generate a Conventional / Plain / Emoji commit message from a git diff.
Translate a question (and optional schema) into SQL, PostgreSQL, MySQL, SQLite, SQL Server.
Translate a question into a MongoDB, Elasticsearch or DynamoDB query.
Explain a regex token-by-token in plain language, with matching and non-matching examples.
Turn a snippet into a structured reviewer-style finding list with severities and categories.
Generate a PR description from a unified diff, Summary, Changes and Test plan.
Free for 7 days. macOS 10.15+ · Apple Silicon & Intel.
Molot