Small tools for the jobs that come up every week.
Convert data to code, check a file, tidy a list. These tools run in your browser, need no account, and do not upload what you paste.
Data tools
JSON Formatter & Validator
Format, validate and minify JSON, with indent options and clear error messages.
CSV Splitter
Split a large CSV into smaller files by file count or rows, with the header repeated. Download as a ZIP.
Files & images
Merge PDF
Combine PDF files into one, reorder them, and optionally fit every page to A4 or Letter.
Image Resizer
Resize and compress images by pixels or percent. Choose JPEG, PNG or WebP and see the file size first.
Code generators
JSON to PHP Array
Turn JSON into a PHP array definition you can paste into your code.
Text Lines to Array Code
Convert a list of lines into an array for PHP, Python, Ruby, Java or JavaScript.
CSV/TSV to Array Code
Paste a table from Excel or a CSV and get array code, optionally keyed by the header row.
How your data is handled
- Every tool listed here processes your input in your browser. Nothing you type or paste is sent to our server.
- The site restricts which servers your browser may contact, so a page cannot quietly send your input elsewhere. You can verify this in your browser's network panel.
- We count visits with Google Analytics only if you accept it in the banner. See the Privacy Policy.
More tools in Japanese
This site started in Japanese and has around 55 tools, including JSON formatting, PDF merging and splitting, a regex tester and image resizing. We are translating them gradually, starting with the ones that are most useful outside Japan. Browse the Japanese site (日本語)