Developer Tools

Free online tools that run 100% in your browser - word counter, JSON formatter and more by F9XR Team. No sign-up, zero data retention.

A curated directory of automation, AI and SaaS tools including n8n workflows, community nodes and hosting. Every listing reviewed by a human before it.

Programmable RSS — any source to email, Slack, or webhook. Pay per send.

SmartLinks brings multilingual ASO, localized screenshots, pricing, reviews, automatic AI content and Apple, Google Play and AdMob revenue into one workspace for mobile app teams.

Privacy-first AI face analysis for user-provided photos, with clear face-shape context, visible symmetry signals, Golden Ratio comparisons, and developer APIs. Free to use, no account required.

Capsule is a website to app converter that turns any URL into a branded, downloadable Android APK — no code, no subscription, $120 one-time per app.

PicDo AI — Free AI Image Editor Online

HOL Guard is an open-source (Apache-2.0) runtime layer for AI coding agents. It intercepts tool use (shell, secrets, MCP, installs) on your machine instead of trusting the model. pipx install hol-guard && hol-guard init. Scan is not a safety guarante

Ultimate WP Audit lets agencies, freelancers & devs deliver white‑label SEO, security & performance reports, scale client audits, and boost agency revenue.

Tiny ocean container JSON. GET /v1/track?id=CONTAINER. Public Maersk track-and-trace HTML only

LaunchNest LN is a product launch platform and startup directory where founders launch new products, SaaS tools, and startups — and where users discover what is next.

Shared project memory for people and AI coding agents. Works in Cursor, Claude Code, Codex, Grok, Windsurf, and the rest.

Free, local-first browser tools for JSON, APIs, OpenAPI, JWT/JWK, code formatting, data checks, webhooks and DevOps workflows. Use practical developer utilities directly in the browser.

A searchable library of 1,000+ free browser tools for images, PDFs, text, data, development, conversion, and everyday workflows.

PiPic is a privacy-first image compressor for people and AI agents, with a free browser app plus CLI and HTTP API support for PNG, JPEG, WebP, and AVIF.

SMB B2B integration hub. Trading partner sends the mandate

Device-Test is a privacy-first alternative to separate microphone, webcam, speaker, display, keyboard, and sensor test sites.

Zero-dependency Python CLI that audits any website — security headers (HSTS, CSP, XFO), TLS, and SEO basics — and emits a clean, client-ready HTML report in seconds.

Convert PNG and JPG images to SVG, compress images, and switch between popular formats directly in your browser. No uploads, no signup, and no watermarks.