BECOOL

BECOOL Overview

BECOOL, known on X as @becool_me, is an independent developer focused on small web applications, domain infrastructure, productivity utilities, and developer services. A June 2026 roundup of Chinese-speaking independent makers identified BECOOL as the developer behind Query.Domains, Small.im, Favicon.im, and Datetime.app.^[1]

The developer's public profile uses the motto Build for fun! and showcases a collection of lightweight products rather than a single flagship startup.^[2] Public development posts document experimentation with AI coding assistants, Cloudflare infrastructure, browser-local processing, and open-source software.^[3][4]

What BECOOL Built

Query.Domains provides bulk domain availability searches, WHOIS information, domain pricing, and developer API access. BECOOL described creating it in 2024 to address inaccurate or slow existing domain lookup services.^[5][3]

Favicon.im offers a public API for retrieving website icons through simple URLs. BECOOL reported operating it on Cloudflare Workers with CDN caching, and the service currently advertises more than 30 million monthly served requests. This is a published usage claim, not an independently verified revenue figure.^[3][6]

Small.im provides browser-based image compression, resizing, editing, and format conversion. Its credits identify joye61's pic-smaller as the original foundation and explain that the application was migrated from React to Vue/Nuxt.^[7][4]

Datetime.app combines a world clock, timezone comparisons, time conversion, and developer-oriented date information. Its public repository uses the MIT license.^[8]

IP.network provides public IPv4 and IPv6 lookup, IP information, command-line endpoints, and network calculation tools.^[9]

Temp.now generates disposable email inboxes without requiring registration. Its documented workflow includes real-time message reception and optional access tokens for reopening an inbox.^[10]

Base64.sh provides browser-local Base64 encoding and decoding, including URL-safe conversion and file-related utilities.^[11]

BECOOL also created Buzz0, a daily Show HN discovery interface, and Upvote0, a related Product Hunt discovery tool. Development posts explicitly connect both projects to Claude Code.^[3][12][13]

AirTips is an invite-only creator profile and tipping platform. BECOOL previewed plans for digital-product transactions and payment integrations in October 2025.^[14][3]

TryCatch is an experimental error-monitoring service designed around agent-assisted debugging and MCP integrations. BECOOL announced an early-access waitlist in June 2026.^[3][15]

How BECOOL Builds

BECOOL's development workflow combines AI assistance with established web technologies. In July 2025, the developer explicitly credited Claude Code with accelerating the Small.im rewrite, particularly interface implementation and design iteration.^[3][4]

The Datetime.app repository identifies Windsurf as part of its development workflow. The same repository documents a Next.js-based application and provides instructions for local development and Docker deployment.^[8]

In June 2026, BECOOL reported using Codex to implement the initial functionality of TryCatch. The published statement establishes Codex usage without specifying which Codex interface was used.^[3]

Infrastructure choices vary by product. Favicon.im uses Cloudflare Workers and caching, whereas Small.im emphasizes browser-side processing through WebAssembly and Web Workers.^[3][7]

Business Model

BECOOL's portfolio combines free utilities with published commercial plans. Query.Domains lists a free tier and an annual Pro offering with increased limits, additional saved domains, and API access.^[16]

Small.im publishes free and paid plans, including API-related benefits. Its homepage separately promotes unrestricted free browser processing, so the published pages should not be interpreted as proof of actual subscription sales.^[17][7]

Favicon.im offers publicly accessible favicon endpoints and displays a sponsorship section. AirTips experiments with creator payments, while TryCatch advertises early-access plans for hosted error monitoring.^[6][14][15]

No sufficiently verified product revenue figures were established from the reviewed founder statements or payment-provider records.

Timeline

Lessons

Build utilities around specific recurring problems. Query.Domains and Favicon.im originated from dissatisfaction with existing tools, while Datetime.app later gained features inspired by user feedback.^[3]

Choose infrastructure appropriate to the workload. Browser-local image processing avoids routine file uploads, while caching reduces repeated origin work for a high-volume favicon API.^[7][3]

Use AI coding tools for concrete development tasks. BECOOL's examples include rewriting an existing application, creating discovery interfaces, and implementing an error-monitoring prototype.^[3][4]

Credit original open-source work. Small.im explicitly acknowledges its upstream foundation rather than presenting the underlying compression application as an entirely original implementation.^[4]

Further Reading

Explore Claude Code in the AI IDE List directory, Windsurf in the AI IDE List directory, and Codex CLI in the AI IDE List directory for the AI coding tools connected to BECOOL's documented development work.