Developer Builds 750+ Free Browser-Based Tools With No Backend or Signup

·1 views

A developer has created a collection of over 750 free tools — including JSON formatters, hash generators, and color pickers — that run entirely in the browser using plain HTML, CSS, and vanilla JavaScript. The project was motivated by frustration with scattered, ad-heavy online tools that each had different interfaces and limitations. Every tool requires no login, no server calls, and no database, and the site is hosted for free on GitHub Pages. AI was used to generate initial implementation logic for each tool, with the developer manually reviewing and quality-checking each one before publishing. The bilingual platform supports both English and Chinese and is accessible at webtools-cn.github.io/tools-site/.

Read the full story at DEV Community

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

Developer Completes Cyber Security 101 Learning Path on TryHackMe

A developer named Ahmed Al-Diab has completed the Cyber Security 101 learning path on TryHackMe, an online cybersecurity training platform. The achievement was shared publicly on DEV Community along with a verifiable certificate link. TryHackMe offers structured learning paths designed to build foundational skills in cybersecurity. The Cyber Security 101 path is aimed at beginners looking to establish core knowledge in the field. Ahmed also shared the milestone on his LinkedIn profile, highlighting his professional development in cybersecurity.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

Developer Launches Browser-Based AI Tool to Remove and Replace Video Backgrounds

A developer has launched bgchanger.video, a browser-based AI tool that removes or replaces video backgrounds without requiring heavy editing software. The tool allows users to upload a video, strip its background, and export the result in multiple formats including MP4, WebM, MOV, MKV, and GIF. It is designed for creators, marketers, and product teams who need quick background cleanup for demos, social media clips, and ad creatives. The current version supports transparent background export and solid color replacement, with original audio preserved. The developer is actively seeking user feedback on potential features such as custom background uploads, templates, and batch processing.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

How Runtime Policy Layers Can Prevent AI Agents from Executing Harmful Actions

As AI agents gain the ability to call tools, write records, send emails, and trigger workflows, developers face a growing risk of unintended production damage even without malicious intent. A runtime policy system acts as a deterministic checkpoint between the AI model and any real-world action it proposes. Unlike system prompts, which only guide behavior and can be bypassed, a runtime policy layer enforces hard rules by evaluating each proposed tool call before execution. The system can allow, deny, hold for human approval, or modify an action based on explicit criteria such as tenant identity, cost limits, and task context. Developers building agentic features are advised to wrap every proposed action in a server-owned envelope and route all tool calls through this gate rather than passing them directly to executors.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

Google AI Studio's One-Click Export to Antigravity: What Works and What Doesn't

Google introduced an 'Export to Antigravity' feature at I/O 2026, promising a seamless one-click transfer of multi-agent AI Studio prototypes to a local development workspace. The export successfully carried over all project files and the Gemini API key, but conversation history did not transfer despite being explicitly listed in the export dialog. The exported project also contained a pre-existing code bug — an unsupported combination of tool use and forced JSON-mode output in the Gemini API — which was baked into AI Studio's generated code rather than caused by the export itself. The bug was resolved using Antigravity's built-in AI agent, which proposed and applied a fix across multiple files, allowing the two-agent Research Digest app to run successfully end to end. Developers are advised to manually back up conversation history, locate the exported project folder independently, and do a full test run before continuing to build on the exported code.

0 comments Read more at DEV Community