Last updated 06-28-2026
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ToolerBox is a free online toolbox with more than 150 browser-based utilities for SEO, YouTube, writing, developers, networking, email, images, PDFs, and everyday calculations. You can open any tool and start using it without creating an account, and many tools run entirely in your browser so your inputs never leave your device.
The site groups tools into categories like keyword research, JSON formatting, PDF editing, QR code generation, bulk email verification, and AI helpers such as an image-to-prompt generator and math solver. ToolerBox positions itself as one place that can replace several single-purpose paid apps for common marketing and productivity tasks.
For teams that need automation at scale, ToolerBox also offers a REST API and MCP server that expose selected tools for bulk jobs, integrations, and AI agents. The web toolbox stays free; API access uses a credit-based model documented on the developer site.
More than 150 free tools across SEO, YouTube, writing, developer, network, email, image, PDF, and calculator categories
No signup required to start using tools in the browser
Privacy-first design with many tools processing data locally in your browser
Keyword research, suggestions, rank checking, and other SEO utilities in one place
Writing helpers including word counters, grammar checks, and AI-assisted generators
Developer utilities such as JSON formatters, DNS lookup, and UTM link builders
REST API and MCP server for running the same tools in bulk or inside AI workflows
Multilingual interface with English, Spanish, French, German, and Arabic options
Large catalog of free browser tools across many categories in one site.
No signup required to start using most utilities.
API and MCP options for developers who need the same tools at scale.
API pricing uses credits rather than flat unlimited access.
The former H-supertools AI writer URL now redirects to the broader ToolerBox homepage.
Is ToolerBox free to use?
Yes. The web tools on ToolerBox are free to use with no signup required to get started. The site also offers a paid API and MCP surface that uses credits for higher-volume or automated use.
Do I need an account to use ToolerBox?
No. You can open and use the free browser tools without creating an account. Sign-in is available for dashboard, API key, and billing features when you need programmatic access.
What kinds of tools does ToolerBox include?
ToolerBox lists tools across categories such as SEO, YouTube, writing, marketing, developer utilities, networking, email, images, PDFs, generators, and calculators. Examples include keyword research, JSON formatting, PDF editing, QR codes, and bulk email verification.
Does ToolerBox offer an API?
Yes. ToolerBox documents a REST API and MCP server for endpoints such as bulk keyword metrics, disposable email checking, website screenshots, YouTube transcript lookup, and more. API calls use credits as described in the docs.
Who operates ToolerBox?
ToolerBox is operated by LearnWithHasan according to the site's privacy policy. Privacy questions can be sent to [email protected].