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 — accents transliterated, symbols removed.
• SQL Formatter — Format SQL queries with dialect-aware rules for MySQL, PostgreSQL, SQLite and more.
• HTML Formatter — Beautify HTML — proper indentation, with 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.