Browser extensions and in-browser tools by Chinese indie developers (2026)
Hand-picked 17 products · updated 2026-11-04
Extensions and browser-native tools: {n of them}, covering bookmark and tab management, downloading web media, reading and translation, creative experiments, and in-browser format conversion. All from Chinese indie developers, mostly free.
Product descriptions are machine-translated from the developers' original Chinese (the original text stays untouched on every product's Chinese page). Every listing links to our English product page, which in turn links to the product's official site.
Bookmarks & Tab Management 2
- BookmarkHell Browser bookmark organization tool, import bookmark files exported from Chrome or Edge, deduplicate, classify, check and adjust and then import them back to the browser
- LazyTabs Chrome tab storage plug-in supports customizing and editing storage rules
Web Media & Downloads 3
- FlowPick Automatically detect and download media resources such as videos, audios and images in web pages - free and open source browser extension
- WebVideoHarbor WebVideoHarbor Free and open source web media saving tool for macOS, which recognizes MP4, WebM and non-encrypted HLS/M3U8 through Chrome extension, and downloads it by local assistant
- FluxDown Multi-protocol download manager, a task queue to receive HTTP/FTP, BT magnetic, eD2K, HLS and DASH at the same time, IDM-style dynamic segmentation (continue to divide the remaining intervals during the download, slow nodes will not delay the end), automatically take over the browser download after installing the extension, free and open source for all Win/macOS/Linux/Android platforms
Reading & Comprehension 2
- Kindly-Web An open-source Chrome browser plug-in that automatically scans the comment area (currently adapted to Bilibili) and calls a large language model to rewrite offensive, weird or negative comments into harmonious, friendly and rational expressions in real time
- Loamery Save or refine valuable answers in ChatGPT, Claude, Gemini, DeepSeek, Doubao, and Kimi with one click. Through search, collection, and project organization, you can precipitate scattered AI conversations into a personal knowledge base that can be searched for a long time. Data is saved locally first - browser plug-in
Creative & Entertainment 5
- YiBoard A chess platform that can be played directly in the browser. You can play backgammon against real AI engines or friends for free. No account or download is required. There is an 18-level ladder from "9th level" to "9th level". Chinese chess and Go are also included in the roadmap.
- Synthesizer Flow Browser-side modular synthesizer, builds audio workflow through visual nodes and connections, supports real-time sound synthesis, MIDI sequencing and AI Agent-assisted modification projects
- LiveFaceSwap AI Real-time AI face-changing tool allows you to experience face-changing, dress-up and style repainting in the browser; the Windows 11 desktop version can access live broadcast, conferencing and video calling software through a virtual camera
- 0trace Pure P2P browser end-to-end chat and file transfer, no server transfer, no need to register, open and use
- TempCanvas Free, no registration required temporary online whiteboard. Open it to quickly draw, record handwriting and export PNG. The content is only saved locally in the browser.
Conversion & Dev Helpers 5
- Chrome Renamer Locally replace the brand name in Google, YouTube and Chrome pages, support customized new tab page; no account required, settings are only saved locally in the browser - Chrome extension, developer mode needs to be enabled for manual loading
- ImageToSTL.online Free PNG/JPG to STL online tool, generates 3D printable models locally in the browser, supports logo extrusion, relief, lithophane and keychains, no registration required
- Semaphore Drag the image into the browser and it will turn into an ASCII character painting in seconds. No uploading or registration. Just copy it into plain text and paste it into the terminal, code comment, and chat window with one click. It supports braille dot matrix high-density mode and txt/PNG/share card export.
- AiXian Toolbox, install desktop-level tools into the browser, including 50+ tools such as PDF merging, picture background removal, AI ID photo, JSON formatting, OCR recognition, etc. All are processed locally and the files do not leave the device.
- Next BConvert 70+ free tools, supporting image, video, audio, PDF and text processing, running locally in the browser, no need to upload, no account, no restrictions
Frequently asked questions
Which browsers do these extensions support?
Mostly Chrome and Edge, and many also work in Firefox or other Chromium browsers. The individual product page says which stores it's published in.
Are these extensions safe to install?
We list the developer's own description without rewriting it, and every entry links to the product's official page and store listing. Extensions request browser permissions — check those in the store listing before installing, as you would with any extension.
What can a new-tab or bookmark extension actually do?
Typically: replace the new-tab page with something useful, manage large numbers of bookmarks and tabs, switch between search engines, and sync settings without an account.
Are there extensions that keep data local?
Yes — several explicitly state they collect no personal data and store settings locally. Those are marked in the product description.
Do I have to pay for these?
Most are free. A few have a paid tier for extra features, which is the product's own model. The directory itself is free.