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Stop writing one-off scripts
Paste your JSON or CSV, get instant results. Built for developers who value their time.
Available Tools
Duplicate Checker
Find duplicate values by any key. Supports single and multi-key detection.
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Data Mapper
Extract and transform fields. Convert array of objects to simple arrays.
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Validator
Check required fields, null values, and validate data types.
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JSON Diff
Compare two JSON objects. Find added, removed, and changed values.
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JSON Formatter
Beautify, minify JSON. Convert between JSON and CSV formats.
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UUID Generator
Generate UUIDs, nanoids, or custom IDs in bulk.
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Base64 / JWT
Encode/decode Base64 strings. Inspect JWT tokens.
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URL Encoder
Encode/decode URLs and parse query strings.
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Regex Tester
Test regex patterns with real-time highlighting.
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Frequently Asked Questions
What is LazyDev?
LazyDev is a free online toolkit for developers to perform common data operations like finding duplicates, mapping fields, and validating JSON/CSV data without writing scripts.
Is LazyDev free to use?
Yes! LazyDev offers a free tier with up to 500KB file processing. Pro users get 5MB limit, export features, and processing history for just $2/month.
Is my data safe?
Absolutely. Free tier processing happens entirely in your browser - your data never leaves your device. We don't store or log any of your data.
What file formats are supported?
LazyDev supports JSON and CSV formats. You can paste data directly or upload files. The tools automatically detect the format.
Do I need to create an account?
No signup required for free features. You can start using all tools immediately. An account is only needed for Pro features.