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DevCodivo

About

DevCodivo is a collection of free online tools for developers, programmers, and data professionals: JSON formatting and validation, format conversion, encoding utilities and more.

Our privacy-first approach

Every tool on this site processes your data locally, in your browser, using JavaScript. Nothing you paste, upload or generate is ever sent to a server: there is no backend that receives your input, no database storing it, and no logs of tool inputs. You can verify this yourself: open your browser’s network inspector while using a tool and you will see no requests carrying your data.

Why we built this

Developer tools should be fast, trustworthy, and free of friction. No sign-ups, no artificial limits, no “upgrade to unlock” walls. Just open a tool and get to work.

Current tools

  • JSON Formatter: Format and beautify JSON with configurable indentation, or minify it in one click.
  • JSON Validator: Check whether JSON is valid and get precise error locations with line and column numbers.
  • JSON Minifier: Compress JSON by removing whitespace and see exactly how many bytes you saved.
  • JSON Diff: Compare two JSON documents and highlight additions, removals and changed values with paths.
  • JSON to CSV: Convert JSON arrays of objects to CSV with automatic column detection and proper escaping.
  • CSV to JSON: Convert CSV data to JSON with automatic delimiter detection and support for quoted fields.
  • Base64 Encoder: Encode text to Base64 with full Unicode support. Fast, free and runs entirely in your browser.
  • Base64 Decoder: Decode Base64 back to readable text with strict validation and clear error messages.
  • URL Encoder: Percent-encode text or full URLs for safe use in query strings and links.
  • URL Decoder: Decode percent-encoded URLs and query strings back to readable text.
  • UUID Generator: Generate secure random UUIDs (version 4) in bulk, with formatting options.
  • JWT Decoder: Decode JWT headers and payloads, with expiration and timestamp claims explained.
  • Timestamp Converter: Convert unix timestamps to readable dates and dates back to unix time, in seconds or milliseconds.
  • Hash Generator: Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text, locally in your browser.
  • Regex Tester: Test regular expressions against sample text with live match results and capture groups.
  • Cron Generator: Build and explain cron expressions: see what a schedule means and when it runs next.
  • HTML Encoder: Encode text for safe use in HTML: the five special characters, or all non-ASCII as numeric entities.
  • HTML Decoder: Decode HTML entities back to readable text: named entities and numeric references.
  • JSON to YAML: Convert JSON to clean, readable YAML with configurable indentation.
  • YAML to JSON: Convert YAML to JSON with clear errors that point to the exact line.
  • JSON to XML: Convert JSON to XML with attribute support, arrays and indentation control.
  • XML to JSON: Convert XML to JSON with strict validation and clear line/column error messages.
  • Text Case Converter: Convert text between UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case and more.
  • Lorem Ipsum Generator: Generate lorem ipsum placeholder text as paragraphs, sentences or words.
  • URL Slug Generator: Turn any text into a clean URL slug, with accents transliterated and symbols removed.
  • SQL Formatter: Format SQL queries with dialect-aware rules for MySQL, PostgreSQL, SQLite and more.
  • HTML Formatter: Beautify HTML with proper indentation, and embedded CSS and JS formatted too.
  • CSS Formatter: Beautify CSS stylesheets: one declaration per line, consistent indentation.
  • JavaScript Formatter: Beautify JavaScript: consistent indentation, spacing and brace styles.
  • JSON Schema Validator: Validate JSON against a JSON Schema (draft-07 to 2020-12) with clear, path-aware error messages.

More tools are on the roadmap: Base64 and URL encoding, UUID generation, a JWT decoder, a regex tester, timestamp conversion and cron expressions.