Last updated 08-30-2026
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ToolerBox (formerly H-supertools)
ToolerBox is a free online marketing and productivity toolbox with 174 browser-based utilities for SEO, YouTube, writing, developers, networking, email, images, PDFs, and everyday calculations. The former H-supertools AI writer URL now redirects here, but the site has grown into a broad catalog rather than a single writing app. You can open most tools without creating an account, and many run entirely in your browser so inputs never leave your device.
Where standalone SaaS apps charge monthly for one job, ToolerBox bundles keyword research, PDF editing, JSON formatting, bulk email verification, QR codes, and AI helpers like an image-to-prompt generator into one free site. The trade-off is navigation: you pick from 12 categories and 174 tools instead of a guided workflow built around one task. Teams that need automation can use the documented REST API and MCP server with credit-based billing per endpoint.
Marketers, SEO specialists, content writers, and developers use ToolerBox for quick checks that do not justify another subscription. Common jobs include keyword volume lookups, on-page word counts, UTM link building, DNS lookups, and PDF splits or compressions. The web toolbox stays free; API access is optional for bulk jobs and integrations.
174 free tools across 12 categories including SEO, writing, PDF, image, and developer utilities
No signup required to start using most browser tools on the site
Writing category alone lists 71 tools such as word counters and grammar helpers
REST API and MCP server with endpoints like bulk-keyword-metrics (1 credit per 5 keywords) and youtube-transcript (1 credit per call)
Interface available in English, Spanish, French, German, and Arabic
Featured utilities include a PDF editor, JSON formatter, bulk email verifier, and keyword research tool
Many tools process inputs locally in the browser so data never leaves your device
174 free browser tools across 12 categories in one site
No signup required to start using most utilities
Many tools process data locally in the browser
REST API and MCP options for developers who need scale
API access uses credits rather than flat unlimited pricing
The former H-supertools URL redirects to the broader ToolerBox homepage
Large catalog can make finding one specific tool slower than a single-purpose app
Is ToolerBox free to use?
Yes. ToolerBox offers 174 free browser tools with no signup required to start. The site also documents a paid REST API and MCP server that bills in credits for higher-volume or automated use.
How many tools does ToolerBox include?
ToolerBox lists 174 free tools organized into 12 categories such as SEO, writing, PDF, image, developer, and email. The writing category alone includes 71 tools on the catalog page.
Does ToolerBox offer an API?
Yes. ToolerBox documents a REST API and MCP server for endpoints including bulk keyword metrics, disposable email checking, website screenshots, and YouTube transcript lookup. Calls use credits as listed in the docs.
Do I need an account for ToolerBox?
No. You can open and use most free browser tools on ToolerBox without creating an account. Sign-in is available when you need dashboard access, API keys, or billing for programmatic use.
Who operates ToolerBox?
ToolerBox is operated by LearnWithHasan according to the site's privacy policy. Privacy questions can be sent to [email protected].
What languages does ToolerBox support?
ToolerBox offers a multilingual interface with English, Spanish, French, German, and Arabic options selectable from the site header.