Native · on-device assistance · private by default

The native developer toolkit for Mac, iPhone & iPad.

Anvil is a fast, native developer toolkit for macOS, iOS, and iPadOS: format, inspect, convert, generate, and debug everyday developer data with on-device processing.

No account required
No content uploads
Free tools + Pro unlock

Download on the App Store

Available now for Mac, iPhone, and iPad on the App Store.

Localized Anvil App Store screenshots showing the toolkit on iPhone

Localized App Store screenshots from the current Anvil release.

Why Anvil

Fast, private, and native: everyday utilities for developers on Apple platforms.

Native, responsive app

Fast launch, low memory use, and a real Apple-platform feel.

On-device assistance

Assisted repair is designed to keep tool content on your device.

Every Apple device

One app for macOS, iOS, and iPadOS.

Liquid Glass design

Focused panes, glass surfaces, and platform-adaptive layouts.

Private by default

No required account and no content uploads for developer data pasted into tools.

Full toolkit

JSON, timestamps, Base64, JWT, URL encoding, UUID/ULID, hashing, QR codes, SQL, diffing, and more.

Universal

One app. Every Apple device.

Anvil is a single universal app for Mac, iPhone, and iPad. It launches quickly, adapts to each screen size, and keeps your developer data on-device.

2.3s: Debug first launch after build
100%: On-device processing
3: Apple platforms
0: Content uploads

One app. Every Apple device. Localized App Store screenshots from the current Anvil release.

The toolkit

One app, many tools. Here's what's inside today.

JSON Format/Validate

Format, beautify, or minify JSON strings

Timestamp Converter

Convert between Unix timestamps, dates, and timezones

Base64 Encode/Decode

Encode and decode Base64 strings with format variants

URL Encode/Decode

Encode and decode URLs with RFC 3986 and form encoding support

JWT Debugger

Decode and verify JWT tokens

RegExp Tester

Test and debug regular expressions with live matching

UUID/ULID Generator

Generate and decode UUIDs, ULIDs, and other identifiers

Text Diff Checker

Compare two texts and highlight differences

YAML ↔ JSON

Convert between YAML and JSON formats with auto-detection

Number Base Converter

Convert between binary, octal, decimal, hexadecimal, and custom bases

HTML Preview

Preview and format HTML with live WebView rendering

Backslash Escape/Unescape

Escape and unescape backslash sequences (\n, \t, etc.)

HTML Entity Encode/Decode

Encode and decode HTML entities with named and numeric formats

HTML Beautify/Minify

Format and minify HTML documents

CSS Beautify/Minify

Format and minify CSS stylesheets

JS Beautify/Minify

Format and minify JavaScript code

ERB Beautify/Minify

Format Ruby embedded templates

LESS Beautify/Minify

Format and minify LESS stylesheets

SCSS Beautify/Minify

Format and minify SCSS/Sass stylesheets

XML Beautify/Minify

Format and minify XML documents

Lorem Ipsum Generator

Generate placeholder text, names, emails, and URLs

QR Code Reader/Generator

Generate and read QR codes with templates and error correction

String Inspector

Analyze string encoding, Unicode, character classes, security, and patterns

JSON ↔ CSV

Convert between JSON and CSV with auto-detection and configurable delimiters

Hash Generator

Compute MD2/4/5, SHA-1, SHA-2, SHA-3, Keccak-256 digests with HMAC and verify support

HTML to JSX

Convert HTML markup to React-compatible JSX

Markdown Preview

Preview Markdown and convert to HTML or HTML + CSS

SQL Formatter

Format SQL queries with dialect-aware parsing across MySQL, PostgreSQL, BigQuery, T-SQL and more

String Case Converter

Convert text between camelCase, snake_case, kebab-case, title case, and more

Line Sort & Dedupe

Sort line-based text, remove duplicates, and normalize whitespace or case

Cron Job Parser

Validate cron expressions and explain each schedule field

Color Converter

Convert HEX, RGB, HSL, HSV, and CMYK colors with palette harmonies

Random String Generator

Generate secure random strings with configurable alphabets

JSON to Code

Generate typed models from JSON across Swift, Kotlin, TypeScript, Python, Java, C#, Go, Rust, Dart, and more

Hex ↔ ASCII

Convert between hexadecimal byte pairs and ASCII text

Anvil is on the App Store

Download the native developer toolkit for Mac, iPhone, and iPad.

Download on the App Store