DevUtilities.net is a free suite of developer utilities for formatting, validating, converting, generating, and inspecting data directly in your browser.
- Privacy first: Formatting, validation, conversion, and generation are performed client-side whenever possible.
- No setup: Use the tools from a browser without installing packages or creating an account.
- One focused workspace: Move between data, security, network, text, AI, and frontend utilities from a single dashboard.
- Built for everyday development: Tools provide structured errors, previews, and export-ready output rather than simple one-line conversions.
Network lookup tools, such as DNS and WHOIS, must make the requests required to retrieve public network data. Sensitive payloads used in formatters, converters, validators, and generators remain in your browser.
- JSON Formatter — validate, beautify, minify, and explore JSON
- Base64 Encoder & Decoder — encode and decode Base64 strings
- LLM Token Counter — count tokens with a color-coded boundary map
- Hash Generator — generate SHA-256, SHA-1, and MD5 digests
- JWT Decoder — decode and inspect JSON Web Tokens
- SQL Formatter — format SQL for PostgreSQL, Snowflake, BigQuery, Spark, Oracle, and other dialects
- Regex Tester — test regular expressions with live matching
- OpenAPI Validator — lint OpenAPI and Swagger documents
- JSON Formatter
- YAML ↔ JSON
- JSON to CSV
- XML ↔ JSON
- Query Params ↔ JSON
- TOML ↔ JSON
- JSONL Validator
- TSV ↔ JSON
- YAML ↔ TOML
- JSON Type Generator
- JSONPath Query
- JWT Decoder
- Hash Generator
- Base64 Encoder & Decoder
- URL Encoder & Decoder
- UUID Generator
- RSA and Ed25519 Key Pair Generator
- AES-GCM Encrypt & Decrypt
- Crypto Toolkit — HMAC, PBKDF2, ULID, and TOTP utilities
- HAR Viewer
- Cron Parser
- URL Parser
- Timestamp Converter
- Subnet Calculator
- DNS Lookup
- WHOIS Lookup
- Network Inspector
- Text Diff
- Case Converter
- Regex Tester
- Markdown Live Preview
- SQL Formatter
- Web Text Toolkit
- Encoding Toolkit
- HTML, CSS, and JavaScript Formatter
- AI Agent Builder
- Structured Output Generator
- MCP Server Validator
- LLM Token Counter
- JSON Data Generator
- Test Address Generator
- Kiota SDK Builder
- OpenAPI Validator
- Developer Toolkit
- Email, Phone, and IBAN Validator
- Color Converter
- Lorem Ipsum Generator
- QR Code Generator
- Random String Generator
- Number Base Converter
- WCAG Contrast Checker
- SVG Optimizer
- CSS Gradient Generator
- Image ↔ Base64
- CSV Viewer
- CSS Unit Converter
- Meta Tag Generator
- Paste the response into the JSON Formatter to validate and explore it.
- Use JSONPath Query to isolate relevant values.
- Generate application types with the JSON Type Generator.
- Check an OpenAPI document with the OpenAPI Validator.
- Preview SDK generation options with the Kiota SDK Builder.
- Create representative payloads with the JSON Data Generator.
- Inspect claims and timestamps with the JWT Decoder.
- Convert timestamps with the Timestamp Converter.
- Generate or compare digests with the Hash Generator.
Decoding a JWT does not verify its signature. Do not treat decoded claims as trusted unless the token has been cryptographically verified by your application.
Yes. The tools at devutilities.net can be used without creating an account.
No. This is the public documentation and feedback repository for DevUtilities. The application is proprietary, and its source code and internal implementation are not published here.
Formatting, conversion, validation, and generation tools are designed to process their inputs in the browser. Tools that perform public internet lookups necessarily send the lookup target to retrieve the requested result.
Yes. Open an issue and include the tool name, expected behavior, and a non-sensitive example when possible. Never include passwords, private keys, access tokens, or confidential production data.
This public repository contains documentation and issue tracking only. It intentionally does not contain DevUtilities application source code, proprietary implementation details, infrastructure configuration, credentials, or other intellectual property.
Copyright © 2026 DevUtilities. All rights reserved.