| What it does | Payment webhook debugger for Stripe, Paddle, Lemon Squeezy, Polar and Dodo
| Free online developer tools that run privately in your browser
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| Stage | MVP
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| Founded | Not given
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| Pricing model | Not given
| Free
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| Pricing | Free plan: $0 forever with 1 project, signature checks for all five providers, 3 days of history with daily event limit. Pro plan: $12 per month with unlimited projects, plain-English diagnosis, fix prompts, and 30 days of history. Lifetime: $99 once, first 100 only, with everything in Pro for life
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| Key features | - Signature verification for Stripe, Paddle, Lemon Squeezy, Polar and Dodo
- Plain-English diagnosis of webhook failures
- Fix prompts for Cursor and Claude Code
- Replay events with re-signed payloads
- Works without localhost for cloud development environments
- View incoming events and HTTP status codes
- 30 days of event history in Pro plan
| - JSON formatter, validator, and converter to YAML, CSV or TypeScript
- JWT decoder for inspecting token header, payload and expiry
- QR code and barcode generator with custom colors and download options
- Image compressor for batch processing to WebP, JPEG or PNG with quality slider
- curl converter between curl, fetch, axios, Python, Go, Node and PHP
- Hash generator supporting MD5, SHA-1, SHA-256, SHA-384, SHA-512
- Cron expression builder and parser with next run times
- JSON diff tool with structural comparison and collapsible tree
- SQL formatter and dialect converter for MySQL, PostgreSQL, SQLite and SQL Server
- Certificate decoder for PEM certificates, chains and CSRs with SANs and fingerprints
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| What makes it different | - Diagnosis explains what went wrong, not just what arrived
- Built for AI code editors and cloud development
- No code changes required during beta
- Covers five payment providers including ones Stripe CLI doesn't support
- Core is open source at launch
| - All tools run client-side in your browser with no data uploads to servers
- Fast static site served from global edge network with no sign-up required
- Clean interface available in 10 languages with dark mode and keyboard shortcuts
- Free to use forever with non-intrusive ads never accessing tool data
- Built as static Next.js export preventing server-side processing of sensitive data
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 2 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 2 | 4 |
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| Citation Flow (Majestic) | 16 | 17 |
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| Referring domains (Majestic) | 2 | 4 |
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PayHook