Data & Formats

JSON Formatter & Validator Format, minify and validate JSON with precise error messages — right in your browser. Image to Base64 Converter Convert an image to a Base64 Data URI with ready-to-paste HTML and CSS snippets — no upload involved. Duplicate Line Remover Delete duplicate lines from any list while keeping the original order — in your browser. Invisible Character Detector Detect, reveal and remove invisible Unicode characters — zero-width spaces, NBSP, bidi marks and more. Tabs to Spaces Converter Convert indentation between tabs and spaces with configurable width — right in your browser. JWT Decoder Decode JWT header and payload, inspect claims and expiration — without the token leaving your browser. XML Formatter & Validator Format, minify and validate XML with clear error messages — right in your browser. Epoch Timestamp Converter Convert Unix timestamps to human-readable dates and back — local, UTC and ISO 8601, in your browser. Markdown Table Generator Build Markdown tables visually — editable grid, per-column alignment and CSV import, in your browser. CHMOD Calculator Convert Linux file permissions between checkboxes, octal (755) and symbolic (rwxr-xr-x) in your browser. HTTP Status Codes Reference Search every standard HTTP status code — 1xx to 5xx, color-coded, with plain-English explanations. ASCII Table The complete ASCII table — decimal, hex, octal, binary and HTML entities, with click-to-copy. IBAN Validator Validate an international bank account number, check its length by country and format it in blocks — in your browser. XML Sitemap Generator Turn a list of URLs into a valid sitemap.xml, generated and downloaded in your browser. Paper Size Reference (A4, letter, DPI pixels) Search any paper size and get its dimensions in mm, cm and inches plus pixels at 72, 150, 300 and 600 DPI. Markdown Preview & HTML Converter See your Markdown rendered side by side and copy the HTML — the preview runs sandboxed in your browser. YAML to JSON Converter Convert YAML to JSON and JSON to YAML, with the exact line and column of any syntax error. SQL Formatter Turn one-line, unreadable SQL into a properly indented query — 18 dialects, all in your browser. Regex Tester Test regular expressions live with match highlighting, capture groups and flags — right in your browser. CSV ↔ JSON Converter Convert CSV to JSON or JSON to CSV — choose the delimiter, paste the data, and copy the result. Text Diff Compare two texts side by side and see exactly what was added, removed or changed — line by line. XML to JSON Converter Convert XML to JSON or JSON to XML — bidirectional, with attributes and nested elements handled correctly. JSON to TypeScript Convert a JSON sample into a TypeScript interface definition. JSON Diff Viewer Compare two JSON documents and see the differences highlighted.