# Earthling Tools

> Free, open-source developer tools that run entirely in your browser. Convert, generate, decode, resize and hash without uploads or accounts. From the Earthling collective, built with Earthling UI.

- Site: https://tools.earthling.dev
- Source: https://github.com/earthling-collective/earthling-tools (MIT)
- Publisher: Earthling Digital (https://earthling.dev), contact contact@earthling.dev
- Design system: Earthling UI (https://ui.earthling.dev)

Every tool runs client-side. Nothing is uploaded, no account is needed, and pages are fully server-rendered for crawlers.

## Text & Data
- [Case Converter](https://tools.earthling.dev/text/uppercase): Convert text between UPPERCASE, camelCase, snake_case, kebab-case, slugs and more.
  - [UPPERCASE](https://tools.earthling.dev/text/uppercase)
  - [lowercase](https://tools.earthling.dev/text/lowercase)
  - [Title Case](https://tools.earthling.dev/text/title-case)
  - [Sentence case](https://tools.earthling.dev/text/sentence-case)
  - [camelCase](https://tools.earthling.dev/text/camel-case)
  - [PascalCase](https://tools.earthling.dev/text/pascal-case)
  - [snake_case](https://tools.earthling.dev/text/snake-case)
  - [kebab-case](https://tools.earthling.dev/text/kebab-case)
  - [CONSTANT_CASE](https://tools.earthling.dev/text/constant-case)
  - [Slugify](https://tools.earthling.dev/text/slugify)
- [Whitespace & Line Tools](https://tools.earthling.dev/text/trim-whitespace): Trim whitespace, collapse spaces, dedupe and sort lines, remove line breaks.
  - [Trim Whitespace](https://tools.earthling.dev/text/trim-whitespace)
  - [Remove Extra Spaces](https://tools.earthling.dev/text/remove-extra-spaces)
  - [Remove Line Breaks](https://tools.earthling.dev/text/remove-line-breaks)
  - [Remove Empty Lines](https://tools.earthling.dev/text/remove-empty-lines)
  - [Remove Duplicate Lines](https://tools.earthling.dev/text/remove-duplicate-lines)
  - [Sort Lines](https://tools.earthling.dev/text/sort-lines)
  - [Reverse Text](https://tools.earthling.dev/text/reverse-text)
- [Encode, Decode & Format](https://tools.earthling.dev/text/json-format): Format and minify JSON, encode and decode Base64, URLs and HTML entities.
  - [Format JSON](https://tools.earthling.dev/text/json-format)
  - [Minify JSON](https://tools.earthling.dev/text/json-minify)
  - [Base64 Encode](https://tools.earthling.dev/text/base64-encode)
  - [Base64 Decode](https://tools.earthling.dev/text/base64-decode)
  - [URL Encode](https://tools.earthling.dev/text/url-encode)
  - [URL Decode](https://tools.earthling.dev/text/url-decode)
  - [HTML Encode](https://tools.earthling.dev/text/html-encode)
  - [HTML Decode](https://tools.earthling.dev/text/html-decode)
- [Cron Expression Explainer](https://tools.earthling.dev/cron): Type a cron schedule and get plain English, a field breakdown and the next run times.
  - [Every minute](https://tools.earthling.dev/cron/every-minute)
  - [Every 5 minutes](https://tools.earthling.dev/cron/every-5-minutes)
  - [Every 10 minutes](https://tools.earthling.dev/cron/every-10-minutes)
  - [Every 15 minutes](https://tools.earthling.dev/cron/every-15-minutes)
  - [Every 30 minutes](https://tools.earthling.dev/cron/every-30-minutes)
  - [Every hour](https://tools.earthling.dev/cron/every-hour)
  - [Every 2 hours](https://tools.earthling.dev/cron/every-2-hours)
  - [Every 6 hours](https://tools.earthling.dev/cron/every-6-hours)
  - [Every 12 hours](https://tools.earthling.dev/cron/every-12-hours)
  - [Every day at midnight](https://tools.earthling.dev/cron/every-day-at-midnight)
  - [Every day at 9am](https://tools.earthling.dev/cron/every-day-at-9am)
  - [Every day at noon](https://tools.earthling.dev/cron/every-day-at-noon)
  - [Every weekday](https://tools.earthling.dev/cron/every-weekday)
  - [Every weekend](https://tools.earthling.dev/cron/every-weekend)
  - [Every Sunday](https://tools.earthling.dev/cron/every-sunday)
  - [Every Monday](https://tools.earthling.dev/cron/every-monday)
  - [First of the month](https://tools.earthling.dev/cron/first-of-the-month)
  - [Every quarter](https://tools.earthling.dev/cron/every-quarter)
  - [Every year](https://tools.earthling.dev/cron/every-year)
- [Number Base Converter](https://tools.earthling.dev/base): Convert numbers between binary, octal, decimal and hex at any size, via BigInt.
  - [Binary → Octal](https://tools.earthling.dev/base/binary-to-octal)
  - [Binary → Decimal](https://tools.earthling.dev/base/binary-to-decimal)
  - [Binary → Hex](https://tools.earthling.dev/base/binary-to-hex)
  - [Octal → Binary](https://tools.earthling.dev/base/octal-to-binary)
  - [Octal → Decimal](https://tools.earthling.dev/base/octal-to-decimal)
  - [Octal → Hex](https://tools.earthling.dev/base/octal-to-hex)
  - [Decimal → Binary](https://tools.earthling.dev/base/decimal-to-binary)
  - [Decimal → Octal](https://tools.earthling.dev/base/decimal-to-octal)
  - [Decimal → Hex](https://tools.earthling.dev/base/decimal-to-hex)
  - [Hex → Binary](https://tools.earthling.dev/base/hex-to-binary)
  - [Hex → Octal](https://tools.earthling.dev/base/hex-to-octal)
  - [Hex → Decimal](https://tools.earthling.dev/base/hex-to-decimal)
- [Hash Generator](https://tools.earthling.dev/hash/sha256): MD5, SHA-1, SHA-256, SHA-384 and SHA-512 digests of any text, computed locally.
  - [MD5](https://tools.earthling.dev/hash/md5)
  - [SHA-1](https://tools.earthling.dev/hash/sha1)
  - [SHA-256](https://tools.earthling.dev/hash/sha256)
  - [SHA-384](https://tools.earthling.dev/hash/sha384)
  - [SHA-512](https://tools.earthling.dev/hash/sha512)
- [Unix Timestamp Converter](https://tools.earthling.dev/timestamp): Epoch seconds, millis or micros to human dates and back, with a live current timestamp.
- [JWT Decoder](https://tools.earthling.dev/jwt): Inspect the header and claims of a JSON Web Token without it ever leaving your browser.
- [Word Counter](https://tools.earthling.dev/word-counter): Live word, character, sentence and paragraph counts with reading time.
- [Text Diff Checker](https://tools.earthling.dev/diff): Compare two versions of a text line by line, entirely in your browser.

## Images & Icons
- [Image Converter](https://tools.earthling.dev/convert): Convert images between PNG, JPG, WebP and AVIF with quality control.
  - [PNG → JPG](https://tools.earthling.dev/convert/png-to-jpg)
  - [PNG → WebP](https://tools.earthling.dev/convert/png-to-webp)
  - [JPG → PNG](https://tools.earthling.dev/convert/jpg-to-png)
  - [JPG → WebP](https://tools.earthling.dev/convert/jpg-to-webp)
  - [WebP → PNG](https://tools.earthling.dev/convert/webp-to-png)
  - [WebP → JPG](https://tools.earthling.dev/convert/webp-to-jpg)
  - [AVIF → PNG](https://tools.earthling.dev/convert/avif-to-png)
  - [AVIF → JPG](https://tools.earthling.dev/convert/avif-to-jpg)
  - [AVIF → WebP](https://tools.earthling.dev/convert/avif-to-webp)
- [Image Resizer](https://tools.earthling.dev/resize): Resize images to exact dimensions: crop, letterbox or stretch.
- [App Icon Set Generator](https://tools.earthling.dev/icon-set): One image in, complete icon sets out: PWA, Expo / React Native and Android, with JSON configs.

## Audio & Video
- [Audio Converter](https://tools.earthling.dev/audio): Convert audio between MP3, WAV, AIFF, FLAC, OGG, M4A and Opus, or extract audio from video.
  - [MP3 → WAV](https://tools.earthling.dev/audio/mp3-to-wav)
  - [MP3 → AIFF](https://tools.earthling.dev/audio/mp3-to-aiff)
  - [MP3 → FLAC](https://tools.earthling.dev/audio/mp3-to-flac)
  - [MP3 → OGG](https://tools.earthling.dev/audio/mp3-to-ogg)
  - [MP3 → M4A](https://tools.earthling.dev/audio/mp3-to-m4a)
  - [MP3 → Opus](https://tools.earthling.dev/audio/mp3-to-opus)
  - [WAV → MP3](https://tools.earthling.dev/audio/wav-to-mp3)
  - [WAV → AIFF](https://tools.earthling.dev/audio/wav-to-aiff)
  - [WAV → FLAC](https://tools.earthling.dev/audio/wav-to-flac)
  - [WAV → OGG](https://tools.earthling.dev/audio/wav-to-ogg)
  - [WAV → M4A](https://tools.earthling.dev/audio/wav-to-m4a)
  - [WAV → Opus](https://tools.earthling.dev/audio/wav-to-opus)
  - [AIFF → MP3](https://tools.earthling.dev/audio/aiff-to-mp3)
  - [AIFF → WAV](https://tools.earthling.dev/audio/aiff-to-wav)
  - [AIFF → FLAC](https://tools.earthling.dev/audio/aiff-to-flac)
  - [AIFF → OGG](https://tools.earthling.dev/audio/aiff-to-ogg)
  - [AIFF → M4A](https://tools.earthling.dev/audio/aiff-to-m4a)
  - [AIFF → Opus](https://tools.earthling.dev/audio/aiff-to-opus)
  - [FLAC → MP3](https://tools.earthling.dev/audio/flac-to-mp3)
  - [FLAC → WAV](https://tools.earthling.dev/audio/flac-to-wav)
  - [FLAC → AIFF](https://tools.earthling.dev/audio/flac-to-aiff)
  - [FLAC → OGG](https://tools.earthling.dev/audio/flac-to-ogg)
  - [FLAC → M4A](https://tools.earthling.dev/audio/flac-to-m4a)
  - [FLAC → Opus](https://tools.earthling.dev/audio/flac-to-opus)
  - [OGG → MP3](https://tools.earthling.dev/audio/ogg-to-mp3)
  - [OGG → WAV](https://tools.earthling.dev/audio/ogg-to-wav)
  - [OGG → AIFF](https://tools.earthling.dev/audio/ogg-to-aiff)
  - [OGG → FLAC](https://tools.earthling.dev/audio/ogg-to-flac)
  - [OGG → M4A](https://tools.earthling.dev/audio/ogg-to-m4a)
  - [OGG → Opus](https://tools.earthling.dev/audio/ogg-to-opus)
  - [M4A → MP3](https://tools.earthling.dev/audio/m4a-to-mp3)
  - [M4A → WAV](https://tools.earthling.dev/audio/m4a-to-wav)
  - [M4A → AIFF](https://tools.earthling.dev/audio/m4a-to-aiff)
  - [M4A → FLAC](https://tools.earthling.dev/audio/m4a-to-flac)
  - [M4A → OGG](https://tools.earthling.dev/audio/m4a-to-ogg)
  - [M4A → Opus](https://tools.earthling.dev/audio/m4a-to-opus)
  - [Opus → MP3](https://tools.earthling.dev/audio/opus-to-mp3)
  - [Opus → WAV](https://tools.earthling.dev/audio/opus-to-wav)
  - [Opus → AIFF](https://tools.earthling.dev/audio/opus-to-aiff)
  - [Opus → FLAC](https://tools.earthling.dev/audio/opus-to-flac)
  - [Opus → OGG](https://tools.earthling.dev/audio/opus-to-ogg)
  - [Opus → M4A](https://tools.earthling.dev/audio/opus-to-m4a)
  - [MP4 → MP3](https://tools.earthling.dev/audio/mp4-to-mp3)
  - [MP4 → WAV](https://tools.earthling.dev/audio/mp4-to-wav)
  - [MP4 → AIFF](https://tools.earthling.dev/audio/mp4-to-aiff)
  - [MP4 → FLAC](https://tools.earthling.dev/audio/mp4-to-flac)
  - [MP4 → OGG](https://tools.earthling.dev/audio/mp4-to-ogg)
  - [MP4 → M4A](https://tools.earthling.dev/audio/mp4-to-m4a)
  - [MP4 → Opus](https://tools.earthling.dev/audio/mp4-to-opus)
  - [MOV → MP3](https://tools.earthling.dev/audio/mov-to-mp3)
  - [MOV → WAV](https://tools.earthling.dev/audio/mov-to-wav)
  - [MOV → AIFF](https://tools.earthling.dev/audio/mov-to-aiff)
  - [MOV → FLAC](https://tools.earthling.dev/audio/mov-to-flac)
  - [MOV → OGG](https://tools.earthling.dev/audio/mov-to-ogg)
  - [MOV → M4A](https://tools.earthling.dev/audio/mov-to-m4a)
  - [MOV → Opus](https://tools.earthling.dev/audio/mov-to-opus)
  - [WebM → MP3](https://tools.earthling.dev/audio/webm-to-mp3)
  - [WebM → WAV](https://tools.earthling.dev/audio/webm-to-wav)
  - [WebM → AIFF](https://tools.earthling.dev/audio/webm-to-aiff)
  - [WebM → FLAC](https://tools.earthling.dev/audio/webm-to-flac)
  - [WebM → OGG](https://tools.earthling.dev/audio/webm-to-ogg)
  - [WebM → M4A](https://tools.earthling.dev/audio/webm-to-m4a)
  - [WebM → Opus](https://tools.earthling.dev/audio/webm-to-opus)
  - [MKV → MP3](https://tools.earthling.dev/audio/mkv-to-mp3)
  - [MKV → WAV](https://tools.earthling.dev/audio/mkv-to-wav)
  - [MKV → AIFF](https://tools.earthling.dev/audio/mkv-to-aiff)
  - [MKV → FLAC](https://tools.earthling.dev/audio/mkv-to-flac)
  - [MKV → OGG](https://tools.earthling.dev/audio/mkv-to-ogg)
  - [MKV → M4A](https://tools.earthling.dev/audio/mkv-to-m4a)
  - [MKV → Opus](https://tools.earthling.dev/audio/mkv-to-opus)

## Generators
- [Strong Password Generator](https://tools.earthling.dev/generate/password): Strong password generator. Cryptographically secure random passwords created entirely in the browser — nothing is sent to a server.
- [UUID v4 Generator](https://tools.earthling.dev/generate/uuid): UUID v4 generator. Create one or many random universally unique identifiers, generated locally in the browser.
- [Random Hex Color Generator](https://tools.earthling.dev/generate/hex-color): Random hex color generator. Create random #RRGGBB color codes for palettes, placeholders and inspiration.
- [Random Hex String Generator](https://tools.earthling.dev/generate/hex-string): Random hex string generator. Create cryptographically secure random hex bytes for tokens, keys and salts — all in the browser.
- [Lorem Ipsum Generator](https://tools.earthling.dev/generate/lorem-ipsum): Lorem ipsum generator. Create paragraphs of placeholder text for mockups and layouts.
- [Random Name Generator](https://tools.earthling.dev/generate/name): Random name generator. Create realistic placeholder names for mockups, tests and sample data.
- [Random Email Generator](https://tools.earthling.dev/generate/email): Random email generator. Fake addresses on reserved example domains — safe for mockups, seeds and form testing because they can never be real inboxes.
- [Random Phone Number Generator](https://tools.earthling.dev/generate/phone-number): Random phone number generator. Fictional US numbers from the reserved 555-01XX range, so they never reach a real person.
- [Random IP Address Generator](https://tools.earthling.dev/generate/ip-address): Random IP address generator. Create IPv4 addresses, private-range addresses, or IPv6 addresses from the reserved documentation prefix.
- [Random MAC Address Generator](https://tools.earthling.dev/generate/mac-address): Random MAC address generator. Locally administered addresses that never collide with real hardware vendors.
- [Test Credit Card Number Generator](https://tools.earthling.dev/generate/credit-card): Test credit card number generator. Luhn-valid numbers for Visa, Mastercard, Amex and Discover — they pass checkout form validation but are not issued cards, so they cannot be charged.
- [Random Date Generator](https://tools.earthling.dev/generate/date): Random date generator. Create random ISO dates within a year range for fixtures, seeds and sample data.

## Color & Shaders
- [Color Converter](https://tools.earthling.dev/color): Convert colors between HEX, RGB, HSL and OKLCH. Paste one format, copy any other.
  - [HEX → RGB](https://tools.earthling.dev/color/hex-to-rgb)
  - [HEX → HSL](https://tools.earthling.dev/color/hex-to-hsl)
  - [HEX → OKLCH](https://tools.earthling.dev/color/hex-to-oklch)
  - [RGB → HEX](https://tools.earthling.dev/color/rgb-to-hex)
  - [RGB → HSL](https://tools.earthling.dev/color/rgb-to-hsl)
  - [RGB → OKLCH](https://tools.earthling.dev/color/rgb-to-oklch)
  - [HSL → HEX](https://tools.earthling.dev/color/hsl-to-hex)
  - [HSL → RGB](https://tools.earthling.dev/color/hsl-to-rgb)
  - [HSL → OKLCH](https://tools.earthling.dev/color/hsl-to-oklch)
  - [OKLCH → HEX](https://tools.earthling.dev/color/oklch-to-hex)
  - [OKLCH → RGB](https://tools.earthling.dev/color/oklch-to-rgb)
  - [OKLCH → HSL](https://tools.earthling.dev/color/oklch-to-hsl)
- [Shader Palette Generator](https://tools.earthling.dev/palette): Design cosine-based color palettes for GLSL shaders and copy the function out.