Handy Dev Tools is a free, browser-based collection of 70+ developer utilities for data conversion, formatting, generation, and encoding—no installation or account required.
Handy Dev Tools is a web platform offering over 70 practical tools for everyday development tasks. It accepts text input or file uploads (up to 100 KB for most tools, with 5120-character limits for text-only tools) and produces transformed output in real time. All processing occurs locally in your browser—no data is sent to servers, ensuring privacy. The platform is built and maintained by the Handy Dev Tools team.
Key Features
- 70+ free tools — Covers data conversion (JSON, YAML, TOML, XML, CSV, SQL), encoding (Base64, URL, Unicode), formatting (SQL, JSON, XML, YAML, GraphQL), generation (UUID, ULID, passwords, test data, QR codes), and text processing (regex testing, diff, case conversion).
- No registration or login — Access any tool instantly without creating an account.
- File upload support — Upload files up to 100 KB for tools like JSON/YAML conversion, XML formatting, and CSV-to-SQL conversion; text-only tools accept up to 5120 characters.
- Real-time conversion — Results update instantly as you type or upload, with no page reloads.
- Privacy-first — All processing stays in your browser; nothing is saved on external servers.
- Clean, ad-free interface — Distraction-free environment with a sidebar organizing tools into categories (Data Format Conversion, Test Data & String Generators, AWS & Cloud, Security & Authentication, Regex & Text Processing, Date/Time & Misc, Developer Tools).
Who is it for?
- Software developers needing quick JSON/YAML/XML conversions or code formatting during development.
- DevOps engineers who generate cloud resource URLs (e.g., CloudFront signed URLs, RDS connection strings) or calculate subnet splits.
- Quality assurance testers creating dummy data with the test data generator (50+ data types) or validating regex patterns.
- Anyone working with data — from converting coordinate formats to encoding URLs or Base64 payloads.
- Convert data formats — Transform JSON to YAML, YAML to TOML, XML to JSON, CSV to SQL INSERT statements, and more, all with real-time preview.
- Generate test data — Use the Test Data Generator to create realistic dummy data (names, addresses, JWT tokens, API keys, Lorem ipsum) and export as CSV, JSON, or SQL.
- Encode and decode — Encode/decode Base64, URL, Unicode escapes, and HTML entities to handle data for APIs or web pages.
- Format and beautify — Format SQL, JSON, XML, YAML, and GraphQL queries to improve readability.
- Work with cloud services — Parse S3 paths, generate CloudFront signed URLs, and build RDS connection strings for multiple databases (MySQL, PostgreSQL, Aurora, MariaDB, SQL Server, Oracle) with SSL, pool, and IAM options.
- Test security tools — Decode JWT tokens, generate RSA key pairs (512–8192 bit), analyze password strength, and validate credit card numbers.
Pricing
Handy Dev Tools is completely free with no paid tiers, no registration, and no usage limits beyond the file size and character constraints per tool.
FAQ
Yes, all tools are free and require no registration. There are no hidden charges or premium features.
Does the site save my data?
No. All processing is done locally in your browser; data is never sent to or stored on Handy Dev Tools servers.
What are the file size limits?
Most file-based tools accept uploads up to 100 KB. Text-only tools (e.g., Base64 encoder) have a 5120-character limit.
No, it requires an active internet connection because the web app runs in the browser with no offline support.
