Chrome-Extension is a repository collecting different types of Chrome extensions, described as beginner-friendly and open source. Its folders include extensions such as a 2048 game, ad blocker, age calculator, alarm clock, BMI calculator, currency converter, dark mode extension, dictionary, password generator and many others.
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A browser-based tool that converts clipboard text into Markdown. Users copy text, paste it into the page, and the converted Markdown appears. Conversion is performed by to-markdown, a JavaScript converter running locally in the browser.
Color Designer is a web tool collection for visual color work. The tools list includes a Palette Generator, Gradient Generator, and Color Name Finder, along with a Color Palette Builder, Color Mixer, Color Wheel, Color Converter, Image Color Picker, Random Color Generator, and Color Contrast Checker.
Text case converter for changing uppercase, lowercase, title case, and sentence case.
Online converter for turning media files into video formats and web-ready clips.
ConvertAll is a unit converter that allows combining units in arbitrary ways, including units with non-linear scales such as temperature. Units may be entered by name or abbreviation and combined with operators, and unit data includes over 500 units. A single code base runs on Linux, Windows, Android and the web.
ConvertFiles is an online file converter supporting over 300 formats of documents, images, presentations, archives, audio and video files. Users upload files, select an output format and quality, then download the result or receive it by email. Files are handled with SSL encryption and deleted from the server after 4 hours for non-signed-in users.
A browser-based utility that converts infix expressions to postfix or prefix notation and shows the conversion steps. It also evaluates postfix and prefix expressions. The page states that spaces must not be used in the expression. Algorithm steps for the postfix and prefix conversions are presented, and the page was updated on 26 February 2023.
EXP Soundboard is a soundboard application that supports almost all MP3s and WAVs. Sounds can be triggered with custom keyboard hot-keys and played through up to two outputs. It includes a Mic Injector to route microphone audio into a virtual audio cable and a converter tool for audio files. A Java 7 requirement is noted.
ezyZip is a browser-based tool for compressing, extracting and converting files. It creates ZIP archives and extracts RAR, 7z and GZ files, and it also converts archive, image and audio/video formats. The site lists a Pro option including a downloadable archive converter app for offline use.
FastSSH.com offers free VPN accounts and SSH-based proxy accounts, including OBFS, WebSocket CDN, SSL (Stunnel) and UDP variants, alongside tools such as an open port checker and IP to decimal converter. The site also lists V2Ray and VPN app services and accepts feature requests for tools or new features.
FastStone Image Viewer is an image browser, converter and editor that supports major graphic formats including JPEG, PNG, GIF, TIFF and camera raw files. It is free for personal use and includes viewing, management, resizing, cropping and color adjustments.
FFmpeg Online Converter is a browser-based tool that converts image, audio and video formats using FFmpeg compiled to WebAssembly. Files are processed locally and are not uploaded to a server. It supports conversions such as mp3 to wav, mp4 to gif and webm to mp4. Conversion speed depends on the computer, and the tool is recommended for short videos or audio files.
FFmpeg Batch AV Converter is a free Windows audio and video encoder providing a graphical interface for ffmpeg. It supports drag and drop, progress information and multi-file batch encoding that launches simultaneous processes up to the CPU thread count. It can trim, concatenate, multiplex streams, batch subtitle videos, record screen and capture M3u8 or YouTube URLs.
FicDownloader is an online fanfiction downloader and converter. It fetches stories from FanFiction.net, AO3, RoyalRoad, Scribblehub and other platforms and converts them into EPUB, PDF or MOBI ebooks. Users paste a story URL, choose a format, and the tool collects chapters into a single file for offline reading.
FossTorrents T2M is a Javascript tool that converts .torrent files to magnet URIs. Users drop .torrent files onto the page or open them through a file browser, and Javascript is required for the inline converter.
fre:ac is a free audio converter and CD ripper supporting formats such as MP3, M4A/AAC, FLAC, WMA, Opus, Ogg Vorbis, WAV and others. It converts between supported formats, can rip audio CDs while querying the CDDB/GNUdb database for title information, and can be installed on a USB stick as a portable application.
GamingSmart is a free tool site offering a mouse sensitivity converter and eDPI calculator. It converts sensitivity between games using the 360° distance method and states support across 100+ games. No signup is required.
GoOnlineTools is a website offering a collection of online utilities grouped into categories such as programming, image, PDF, code converter, Instagram and YouTube tools. It also links to IconShelf, which offers searching of SVG icons, and the site states the collection keeps growing.
HandyAI is a collection of free browser-based tools for AI and Claude developers, including token counters, prompt analyzers, JSON to tool-use converters and cost calculators. It requires no sign-up and lists the LLM Token Counter and AI Cost Calculator as live tools, with others announced for later release.
Ian Coleman's personal index page linking to tools including a BIP39 mnemonic code converter, an entropy bias calculator, a multisig tool, a Bitcoin key compression tool, Shamir secret sharing and Shamir39 tools, a BLS threshold crypto tool and an EIP2333 BLS12-381 key generator. It also hosts a CIA World Factbook API and statements on donations and a public key.
iBeetle-Base presents data from the iBeetle screen, a first-pass screen of morphological defects in Tribolium. It provides a genome browser for gene structure, expression and chromatin data, a converter between Drosophila and Tribolium gene IDs, and an ontology viewer for the Tribolium morphological ontology. Gene sets and genome assemblies are available for download.
Helium is a music manager for Windows that catalogs, tags, converts, streams and plays local music collections in formats including FLAC, MP3, M4A, Opus, APE and WAV. Companion tools include Helium Streamer, Helium Remote, Helium Converter and Helium Splitter.
Konvert is a browser-based image format converter. It converts HEIC, WEBP and AVIF images to JPG. The site states that conversion happens client-side, so files do not leave the device, and that there are no restrictions or accounts.