Text and developer tools
Kilnfile's text and developer tools count words, change case, format and validate JSON, convert CSV, encode and decode base64 and URLs, compare two texts, and turn markdown into HTML. Everything runs as you type inside your browser tab, so nothing you paste is ever sent anywhere.
Last updated
All text and developer tools (11)
TextWord CounterCount words, characters, sentences and paragraphs as you type, with reading and speaking time.TextCharacter CounterCount characters with and without spaces, plus words and lines, as you type.TextCase ConverterConvert text to upper, lower, title, sentence, camel, snake, kebab or constant case instantly.TextJSON FormatterValidate JSON, pretty print it with your chosen indentation, sort keys or minify it.TextCSV to JSONTurn CSV or tab-separated data into a JSON array of objects, with types converted.TextJSON to CSVConvert a JSON array of objects into a CSV file ready for Excel or Google Sheets.TextBase64 Encode and DecodeEncode text to Base64 or decode Base64 back to text, with full UTF-8 support.TextURL Encode and DecodePercent-encode a query-string value or a whole URL, or decode one back to readable text.TextLorem Ipsum GeneratorGenerate classic lorem ipsum placeholder text by paragraph, sentence or word count.TextMarkdown to HTMLConvert Markdown, including GitHub tables and task lists, into HTML you can copy.TextDiff CheckerCompare two versions of a text and see what was added, removed or changed.
| Tool | Accepts | Batch | Updated |
|---|---|---|---|
| Word Counter | Text | No | 20 September 2026 |
| Character Counter | Text | No | 20 September 2026 |
| Case Converter | Text | No | 20 September 2026 |
| JSON Formatter | Text | No | 20 September 2026 |
| CSV to JSON | Text | No | 20 September 2026 |
| JSON to CSV | Text | No | 20 September 2026 |
| Base64 Encode and Decode | Text | No | 20 September 2026 |
| URL Encode and Decode | Text | No | 20 September 2026 |
| Lorem Ipsum Generator | Any | No | 20 September 2026 |
| Markdown to HTML | Text | No | 20 September 2026 |
| Diff Checker | Text | No | 20 September 2026 |
These are the small utilities you reach for a dozen times a day: a quick word count for an essay limit, tidying a JSON blob from an API, or checking the difference between two versions of a paragraph.
They need no file at all. Paste or type, and the output updates instantly. Copy it or download it as a file.
Guides for text and developer tools
- How to count words for essays and applicationsCheck your word and character count the way markers and UCAS do. UK limits for personal statements, essays and dissertations, plus what counts as a word.
- How to format and validate JSONPretty-print, minify and check JSON in your browser. The RFC 8259 rules that cause most errors, how to read the line and column, and when to sort keys.