👋 Hello Devs! Here’s everything you need, daily
50+ tools that open instantly, run privately, and never ask you to sign up.
50+
Free tools
0
Server calls
∞
No signup
AI Schema Masker
Mask SQL/JSON schema before ChatGPT. Fully reversible in one click.
- GDPR & HIPAA safe
- Deterministic mapping
- Works offline
JSON Prompt Shield
Mask JSON keys & values before AI. Keys→K_00001, strings→S_00001.
- Preserve structure
- Batch masking
- Instant restore
Code Prompt Shield
Mask API keys, variable names & secrets before Copilot or ChatGPT.
- 18 languages
- Pre-scan risk
- Custom patterns
JSON Beautifier
JSON Formatter
HOTJSON Validator
SQL Formatter
HOTJWT Decoder
Base64 Encoder
UUID Generator
CORS Tester
Hash Generator
URL Encoder
Regex Tester
JSON to Excel
Smart JSON Diff
Log Unpacker
cURL Converter
HAR to cURL
cURL Analyzer
Token Compare
Password Gen
Truth Table
Test Data Gen
Mock API
Prompt Chunker
AISpeed Test
Timezone
Schema Gen
SVG to Image
NEWData Insights
NEWPassword Audit
NEWJSON Stringify
Payload Analyzer
API Comparator
Config Compare
JSON Fixer
PDF to Excel
NEWCron Builder
NEWMarkdown Preview
NEWColor Picker
NEWText Diff
NEWJSON → TypeScript
NEWTimestamp
NEWBox Shadow
NEWCSS Gradients
HOTHTML Formatter
NEWImage → Base64
NEWHTML Viewer
NEWHTTP Headers
NEWString Utilities
NEWLog Explorer
SQL IN Generator
NEWAI Schema Masker
AIImage to Text
NEWColor Picker
NEWRegex Tester
JSON Comparator
API Comparator
JSON Schema Gen
Mock API
Test Data Gen
Log Explorer
Payload Analyzer
Config Compare
cURL Converter
HAR to cURL
AI Prompt Shield
AIToken Compare
Need more tools?
Browse the full hub with categories, search, and view modes.
Use AI safely in 4 steps
The AI Schema Masker workflow — applicable to SQL, JSON, and code.
Paste your data
Paste your SQL query, JSON payload, or source code. Nothing leaves your browser at this stage.
Mask identifiers
Click Mask. Real names become anonymous tokens — T_00001, C_00001. The mapping stays on your device.
Send to AI safely
Copy the masked version and send to ChatGPT or any AI. No real schema data is transmitted.
Restore real names
Paste the AI's response. Click Restore. Your real identifiers are put back in one click.
Your data never touches our servers
Every single tool on UnblockDevs runs entirely in your browser. We don't have servers that process your data — because we don't need them.
Try AI Schema MaskerNo server-side processing
All computation happens in your browser using JavaScript. No request is made to our backend.
No logging or telemetry
We don't log your SQL schemas, JSON payloads, API keys, or any other sensitive input.
GDPR, HIPAA, SOC 2 safe
Suitable for regulated industries. Nothing is shared with third parties, ever.
Open architecture
Built with Next.js. Inspect every network request and verify no data leaves your device.
Guides for developers
How to use AI coding tools in healthcare without violating compliance requirements.
8 min readAPI DebuggingWhy Your API Works in Postman but Not in cURL — 7 ReasonsThe most common causes of this frustration and the exact fix for each scenario.
6 min readJavaScriptJSON.stringify Complete Guide — Undefined, Circular References, and Edge CasesEverything JSON.stringify does that surprises developers, with examples for every edge case.
7 min read