Free online string and text tools for encoding, decoding, hashing, formatting and converting text in your browser
Open-source API mock server for multiple protocols
Stage
Not given
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Founded
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Based in
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US
Pricing model
Free
Freemium
Pricing
Not given
Free: $0/month with 10,000 requests/month and local mocks only. Pro: $29/month with 250,000 requests/month, 100,000 platform AI tokens/month, and 3 hosted mocks. Team: $99/month with 1,000,000 requests/month, 1,000,000 platform AI tokens/month, and unlimited hosted mocks. Annual plans include 2 mont
Key features
Base64 encoding and decoding
URL encoding and decoding
JSON formatting, validation and minifying
JWT decoding with readable timestamps
SHA-256 and other cryptographic hashing
UUID generation with multiple versions
Text diffing with multiple formats
Chainable pipelines with live preview
CSV to JSON and JSON to YAML conversion
Regular expression explanation in plain English
Multi-protocol support (REST, gRPC, GraphQL, WebSocket, Kafka, MQTT and more)
Realistic data synthesis with template tokens and faker fields
Latency and fault injection for testing retries and fallbacks
Record and replay for capturing and replaying live traffic
Modern admin UI for managing servers, overrides and metrics
Configuration as code with OpenAPI specs and YAML
Local-first development without account requirement
CI integration with local endpoints
HTTP bridge exposing gRPC services over REST
BYOK AI integration with user provider keys
What makes it different
All processing happens in your browser with no data uploaded to servers
Chain multiple tools into pipelines with live preview of each step
Available across VS Code, CLI, MCP and as a Node.js library
No cookies or tracking scripts, privacy-focused
248 utilities organized by category with guides and worked examples
Multi-protocol mocking from one configuration file
Realism-first simulation with data synthesis and failure injection
Open source with permissive MIT or Apache-2.0 licensing
Local-first approach with optional cloud collaboration
String Utility Belt
MockForge