Free Tools
512 products · updated 2026-10-05
- InkDoo Post an article or link, AI will automatically pick out the paragraph of the picture, and use the same hand-drawn character to draw the entire set of pictures. You can upload your own IP image. Register to get a free quota, and pay a one-time fee per picture.
- 摊账 A free single-site operating balance trial calculation webpage for market stall owners, which calculates the balance after deducting the cost of goods sold, losses and activity expenses; no registration is required, the amount is displayed in RMB, and the interface is provided in Chinese and English
- AI Hair Color Changer 上传自拍选一个发色即可预览换色效果，只改头发，脸、发型和背景保持原样；内置 20 种发色与 5 种染法，可自定义颜色，基于 Ideogram 4.5 Edit，新账号首次免费，之后按积分计费
- South Park Test 回答 35 道简短陈述题，测出你最像《南方公园》里的哪个角色；非官方粉丝测试，无需注册
- AI Code Usage Tray Windows tray usage monitor, you can view the token usage and amount of Claude Code, Codex, Grok CLI, Antigravity, and OpenCode in one place. The official quotas of Claude, Codex, and Grok are permanently displayed on the side floating bar. There are also cross-tool usage reports by day, project, and model; only local session records are read, and usage data is not uploaded. MIT-licensed open source and provides a Windows installation package.
- Decisions API Decision-making model comparison and calling platform, compare Jev, Laya, Kev, Solar, Span and other models in the same online playground, use the "state + question" structure to ask up to 8 typed questions at a time, and return probabilistic choices, scores and right and wrong judgments; the playground is unlimited and free, and the access backend uses a unified REST API and points billing
- 今日宜 WeChat Mini Program, measuring zodiac signs, fun matching between two people, Zhou Gong’s dream interpretation and Zhou Yi divination experience; currently open functions are free and are only for folk culture and leisure and entertainment reference
- 求原图 Extract watermark-free videos and original images from more than 30 platforms such as Douyin, Xiaohongshu, Kuaishou, Bilibili, YouTube, etc. Live images can be packaged into iPhone live or Android dynamic photos, and videos can be cut into GIF or live; free without logging in, MIT open source
- 夜观天象 Astrolabe OKX market and account monitoring panel displays the currency price, K-line, funding rate and unrealized profit and loss of your own positions in real time. If the market fluctuates violently, the funding rate crosses the threshold, or the account opens or closes a position, or equity changes, push reminders are sent through Telegram; it only observes but does not place orders, does not have any trading permissions, and you can view the public market without an API Key - you need to build a self-built Python service, MIT open source
- Flint Skills Manager The local-first AI Skills asset manager collects skills scattered in tools such as Claude Code into a versionable local asset library, and uniformly removes duplication, labels, and deploys to each agent according to defaults. You can also take the assets with you when changing tools; npx flint-skills-hub is ready to use, supports macOS / Windows / Linux, MIT open source
- 轻译 · LightTranslate Windows word-marking translation and English word search tool, press Ctrl+Alt+Q to view the Chinese translation next to the mouse; MIT-licensed open source, provides installation packages, uses its own DeepSeek API Key, and the API is billed by volume
- Kiss Generator AI kissing picture generation tool, upload two photos to combine into one kissing photo, supports real photos and anime characters, log in and get 10 free generation
- 中转塔台 Relay Tower When the upstream price increases in the middle of the night or the main account fails, you don’t need to keep an eye on the background. Automatic reminders and automatic switching. Telegram on mobile phones can cut the line with one click; MIT open source, Docker deployment with one click
- Captions Generator AI subtitle generation tool, upload videos and automatically generate subtitles. It can directly change words, select subtitle styles, translate into more than 100 languages or do bilingual Chinese and English, and export MP4 or SRT/VTT files with subtitles; there is a free version and Pro subscription
- Fomrix AI 3D model generation and viewing tools convert reference pictures or text descriptions into GLB models that can be previewed and downloaded; there are also STL, GLB, OBJ viewing, GLB to STL and STL mesh inspection tools. Account and points are required for generation, and browser viewing and conversion tools are free to use.
- 电商卖家 AI 任务模板生成器 Free product copywriting, customer service reply and translation verification prompt word generator; fill in the known information to copy the structured task description, no need to register, the input is processed locally in the browser, no AI is called, and no input is uploaded
- FileOnTap HEIC to PNG tool (free), the file is converted locally in the browser without uploading to the server, no registration is required, and there is no watermark; it also supports HEIC to JPG, image compression, and image to PDF
- SeshBuddy Desktop session browser and workbench for AI coding tools (Claude Code, Codex, Gemini, Antigravity, WorkBuddy, DSH, etc.), providing unified management of multiple CLI sessions, Tantivy millisecond local full-text search, Monaco code side-by-side Diff review and API traffic penetration inspection; built on Tauri 2 + Rust, 100% local offline without telemetry, open source and free (supports macOS / Windows)
- llms.txt Generator llms.txt generator and validator (free). Fill in a few site information to generate a Markdown file that conforms to llmstxt.org specifications. It supports one-click import of all URLs from sitemap.xml and automatically generates titles. It can also paste existing files to verify H1, link format and URL validity, and give an AI readiness score of 0-100. No registration is required.
- 灵感蜂巢 PromptHive Chinese AI prompt thesaurus, 500+ structured templates with variable slots, classified by Xiaohongshu, Douyin, Bilibili, Zhihu, public accounts and other platforms and creation links, fill in the variables and copy with one click, available for free
- 移民数据 The U.S. green card schedule is officially announced on the 8th to 10th of each month, with a full 15-category comparison (marking each category forward/backward compared to the previous month), Canadian EE 447 lottery records, U.S. processing time and 23 country policy databases, and a self-assessment tool for points from 6 countries; free, no advertising, no intermediary
- VideoCreate The Video to Prompt tool uploads an MP4/MOV reference video within 60 seconds, splits the shots according to time code, and separates the six items of subject, camera movement, action, light, style, and sound shot by shot, and generates prompts suitable for Seedance, Kling 3.0, Wan 2.6, and Grok Imagine; after logging in to Google, you can analyze 5 videos for free every day.
- Online Tone Generator Tone and frequency generation tool (free), generates audio signals of specified frequencies in the browser, supports sine waves, square waves, triangle waves, sawtooth waves, frequency adjustment, left and right channel control and WAV export, and provides audio testing tools such as Frequency Sweep, Multiple Tone, Speaker Test, Subwoofer Test, etc. Audio processing is completed locally in the browser, without uploading files or installing software
- FPS Tester Browser FPS, Frame Time and Display Test Toolset (free), which can test real-time FPS, Frame Time, 1% Low, FPS Stability, FPS Drop and refresh rate, and provides FPS Comparison, Screen Tearing, Motion Blur, Monitor Test, Mouse Polling Rate, Reaction Time and other related test tools to check browser animation performance, display effect and game input performance
- onomeo An AI interface aggregation station compatible with OpenAI. One key can call 35 free models such as DeepSeek, GLM, Gemini, and Qwen. There is no credit deduction for free models (20 times every 5 hours for unpaid accounts). You can also directly talk and draw on the webpage. Large models such as Claude and GPT require payment. It is currently in the public beta stage. There is no guarantee that all functions can be used normally. Feedback is being collected in large quantities. Feedback is welcome.
- 知识公社 A completely offline free learning platform, one-stop learning for real competition questions, public examination question bank, full text of Mao Zedong Selections, and World Skills Competition. It can be used when disconnected from the Internet. You can learn instantly when you open the browser.
- Claude Imagine AI picture and video generation tool, used directly on web pages, and can also be used as an MCP connector to connect to Claude (claude.ai, Claude Desktop, Claude Code) to produce pictures and videos in conversations. It supports Nano Banana 2, GPT Image 2.5, Seedream 4.5, Flux 2 Pro and Veo 3.1 Fast. Register to get free credits; independent product, has nothing to do with Anthropic
- Visual Timer Visual countdown tool, the red disk shrinks over time, and the screen is projected to children and the classroom to know how long is left at a glance; it comes with a bouncing ball Classroom Noise Meter and Christmas Countdown, free and no registration required
- Free Bubble Letters Bubble word generator, input text to generate printable hollow words, one letter fills a page, suitable for coloring and classroom decoration, free and no registration required
- DIY Calculator Home improvement and gardening materials calculator, calculate how much to buy gravel, mulch, topsoil, concrete, ceramic tile, paving stones, input cubic yards, tons, bags and cost, with diagram, free and no registration required
- Morse Code English Morse code translation and learning website, instant two-way translation as input, with printable comparison table, letter-by-letter explanation and SOS distress signal introduction, in line with ITU standards, free and no registration required
- Código Morse Portuguese (Brazilian) Morse code website, two-way translation of text and Morse code, supports telegraph tone three-speed playback and WAV audio download, comes with a complete alphabet click to listen and a seven-day learning plan, free and no registration required
- 拼豆岛 Bean-bean drawing creation tool, convert photos or AI inspiration into editable and printable MARD / Hama bean-bean drawings, automatically count color numbers and bean usage (free)
- AgentHop An open source tool that allows two AI Agents to communicate directly. A pairing code connects two computers without public network addresses. It is end-to-end encrypted and relays only forward ciphertext. It serves as an MCP to access Claude Code, Codex, Cursor, Gemini CLI, etc.
- 精酿 BrewReel Generate Agent Skill for vertical promotional videos, write a product briefing, low-cost models such as DeepSeek only write storyboard JSON, ready-made Remotion components to render 1080×1920 videos locally, built-in advertising law and compliance verification for 6 industries, code synthesis soundtrack, can be loaded into Claude Code / Codex, Apache-2.0 open source, currently in preview version
- Professional-Headshot.ai AI professional avatar generator, upload a selfie, and AI will automatically select the clothing, background and lighting, and filter out defects such as deformation of glasses, eye and tooth distortion, etc. Each scene will only give you 1 recommended photo and 2 alternatives; no registration is required, you can preview 1 photo (with watermark) for free, remove the watermark, download and repeatedly modify it for a one-time payment
- AI 共振 Daily AI Radar ranks GitHub, arXiv, Hacker News, community discussions and AI vendor dynamics into five lists. The scoring formula is publicly available and can be checked. Content that appears on multiple platforms at the same time is automatically grouped. Open and read without registration.
- WearToday The AI personal stylist will give you outfit suggestions based on the local weather, the occasion of the day and the actual clothes in your wardrobe, and remember your color, style and matching preferences; the web version requires no installation and you can start using it for free.
- Mimi A real-time subtitle translation tool that converts foreign language videos and live broadcast sounds played on the computer into floating subtitles; free and open source, supports Apple chips macOS 13+ and Windows x64, and requires your own cloud service API credentials
- Orbi A self-hosted AI programming agent that labels GitHub Issues with the ai-ready tag. It writes code in an independent worktree, opens a PR, and then opens a separate review session to review the Issue acceptance items. Only after the review passes, it is merged and tagged for release; it is open source with AGPL-3.0, self-hosted for free, and there is also a hosted version Orbi Cloud
- JEVAPI.IO Provides free JEV API
- ShellWard A one-line command to check the compliance red lines of the AI project (data outbound, hard-coded keys, personal information exposure), mapped to the Cybersecurity Law/PIPL/Legal Protection 2.0 and given a score, zero dependence on open source
- 本地工作控制台 lwc No need to connect to the Internet or register, just double-click a single file to use the local to-do and plan management platform, all data will be kept on your own computer
- Video to URL Video link transfer tool (free), which generates shareable links after uploading video files. No registration is required, no watermarks, and the source files are not re-encoded.
- Jev.StockAI.Trade AI stock selection tool based on Jev model, focusing on China A shares, free and no advertising
- NiubiGeo NiubiGEO helps AI, SaaS, DevTools and open source projects detect and improve brand visibility in AI search and Q&A scenarios such as ChatGPT, Perplexity, Google AI and more
- 简历通 ResumeForge A locally running AI job search workbench, covering the entire process of resume generation, job collection, delivery tracking, and interview review. Data is only saved locally and not uploaded. Windows one-click startup, open source and free.
- Tancky AI AI picture synthesis and photo fusion tool (free), stitch and mix multiple pictures into one, open it in the browser and use it
- MelodyTrace MP3 to MIDI tool (free): convert sounds into editable notes
- 阅古文 An ancient book reading website, which arranges the annotations and translations sentence by sentence against the original text, and adds the necessary historical background; select the original text or annotations to call AI translation and explanation for free, which can be used immediately after opening the browser, and can also be read on mobile phones
- NeatCompress Batch compression tool for audio, video, PDF and images, using WebCodecs hardware acceleration and WASM dual engines for local processing, files are not uploaded to the server; supports specified target size (WeChat 25MB/100MB, Discord 10MB/50MB, etc.), lossless merging, cropping and converting to GIF
- Jev Social Open source, local-first social media research agent; Jev steps through actions such as searching, opening posts and comments, downloading videos, etc., socai CLI executes in native real Chrome and streams Instagram, TikTok, LinkedIn evidence into research reports with source links
- Grok Canvas Picture and video creation canvas, log in to your Grok account and use account credit, connect to reference pictures to iterate pictures, and then continue to generate videos, supports multi-canvas management, the works are saved locally, MIT open source
- 考试培训系统 The open source online examination and training system supports question bank management, fixed or random examination, online answering and score query. It integrates course learning and examination assessment on the same platform and needs to be deployed by yourself.
- 旧境传说 Chinese retro single-player action RPG, providing warrior, mage, Taoist priest professions, map exploration and boss challenges, which can be matched with random equipment affixes and suits; Mac/Windows desktop browser play, no registration is required, and the progress is saved in the local browser
- ImageToImageAI AI image generation tool, upload images and describe the modification requirements in one sentence to generate new images such as product images, interior design, portraits, stickers, etc.; supports GPT Image 2, Nano Banana 2, Nano Banana Pro models, bilingual in Chinese and English, free trial available
- Unit Converter for Science Free multilingual unit conversion tool for research, engineering and education, providing formulas, conversion factors and step-by-step derivation for 11 types of units
- Color Season AI AI personal color season analysis tool, upload a selfie to get 12 seasonal style determinations and exclusive color palettes, including hairstyle, hair color, makeup try-on and face recognition, free and no registration required - Method Instructions
- Random Animal Generator The random animal mashup generator randomly combines 11 body parts of real animals into fictional creatures. You can lock the parts you like and only replace the rest. It is generated according to cute/horror/mythical theme presets. It automatically names and gives AI painting prompts. Free AI drawings are produced every day without registration.
- Agents Anywhere Cross-device AI Agent workbench, access Codex, Claude Code and DeepSeek Harness on desktop, native mobile and web, manage sessions, files and terminals on multiple devices, MIT open source, supports self-deployment