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JSON vs XLS

JSON vs XLS

Ein detaillierter Vergleich von JSON Data und Excel Spreadsheet (Legacy) — Dateigröße, Qualität, Kompatibilität und welches je nach Workflow zu wählen ist.

XLS → JSON umwandeln
JSON

JSON Data

Documents & Text

JSON (JavaScript Object Notation) is a lightweight data interchange format that is human-readable and easy for machines to parse and generate. It has become the dominant format for web APIs, configuration files, and structured data exchange.

Über JSON-Dateien
XLS

Excel Spreadsheet (Legacy)

Spreadsheets & Data

XLS is the legacy binary format for Microsoft Excel 97-2003 spreadsheets. While superseded by XLSX, it remains common in archived data and older business systems.

Über XLS-Dateien

Vorteilsvergleich

JSON Vorteile

  • Dead-simple — you can memorize the entire grammar on one page.
  • Native parsers in every programming language.
  • Human-readable and easy to debug.
  • Compact — much smaller than equivalent XML.
  • Frozen spec — a JSON parser written in 2010 still handles new JSON files from 2026.

XLS Vorteile

  • Universal legacy — every Excel since 1997 opens .xls natively.
  • Binary format is compact and loads quickly.
  • Full support for formulas, charts, pivots, and VBA macros.
  • Deep integration with every accounting and ERP system of the 1990s-2000s.

Einschränkungen

JSON Einschränkungen

  • No comments allowed — config files feel verbose.
  • No trailing commas — a constant source of parse errors.
  • No native date, decimal, or binary types — everything is strings or numbers.
  • Easily bloated by repeated keys; large payloads compress poorly vs binary alternatives.
  • Streaming is awkward — JSON wants to be parsed whole.

XLS Einschränkungen

  • Row/column limits are ~64× smaller than modern XLSX.
  • Macro-enabled variants are a notorious malware vector.
  • Binary corruption often means total data loss.
  • Cannot represent modern Excel features (dynamic arrays, LAMBDA, structured references).
  • Microsoft stopped evolving the format in 2007.

Technische Spezifikationen

Spezifikation JSON XLS
MIME type application/json application/vnd.ms-excel
Extension .json —
Standard ECMA-404, RFC 8259 —
Encoding UTF-8, UTF-16, or UTF-32 —
Allowed types object, array, string, number, boolean, null —
Max rows — 65 536 (Excel 97-2003)
Max columns — 256 (A to IV)
Container — OLE Compound File
Successor — .xlsx (2007)

Typische Dateigrößen

JSON

  • Small config < 1 KB
  • REST API payload 1-100 KB
  • Database export 10 MB - 100 GB

XLS

  • Simple budget (1 sheet) 30-60 KB
  • Multi-sheet financial model 500 KB - 5 MB
  • Data export with 65 000 rows 5-20 MB

Bereit zum Umwandeln?

Wandle zwischen JSON und XLS online um, kostenlos und ohne Installation. Verschlüsselter Upload, automatische Löschung in 60 Minuten.

XLS zu JSON umwandeln

Häufig gestellte Fragen

JSON (JavaScript Object Notation) is a lightweight text format for data exchange, popularized by Douglas Crockford around 2001. JSON represents nested objects, arrays, strings, numbers, booleans, and null values in a syntax derived from JavaScript. It is the default data format for modern web APIs.

JSON files are plain text — open them in any text editor (Notepad, VS Code, Sublime Text, TextEdit). For formatted reading, use JSON-aware editors (VS Code auto-indents) or online viewers like jsonformatter.org. Every web browser displays JSON directly if you open the file locally.

Use KaijuConverter's JSON-to-CSV converter for nested data flattened into a tabular format. For simple flat JSON (array of objects), command-line tools like jq + csvkit give more control. Python's pandas and JavaScript's PapaParse also handle the conversion in one line of code.

JSON for machine-to-machine data exchange (APIs, config) — strict spec, fast parsers in every language. YAML for human-edited config files — supports comments, multi-line strings, and references. Kubernetes, Docker Compose, and GitHub Actions use YAML; REST APIs overwhelmingly use JSON.

JSON's strict specification disallows comments to keep parsers simple and unambiguous. Workarounds include JSONC (JSON with Comments, used by VS Code config), JSON5 (relaxed syntax with comments), or a convention of adding a "comment" or "_doc" field in your data.

JSON itself cannot execute code like JavaScript eval() can, making it safer than older exchange formats. However, deeply nested JSON can exhaust memory (a "billion laughs" variant) — use streaming parsers and limit recursion depth when processing untrusted input.