Small tools.
Big difference.✳

Convert JSON data into CSV files for analytics and spreadsheet imports.

Format and compress JSON online for API responses and logs.

Convert Unix timestamps to readable dates and back when debugging APIs and logs.

Adjust JPG/WebP quality or re-encode PNG, compare sizes and download.

Turn Excel sheets into JSON for APIs and config imports.

Compare two texts and highlight differences for code and document review.

Merge multiple CSV files by columns for combining reports and datasets.

Build Linux, Quartz and Spring schedules and preview upcoming runs.

Encode and decode UTF-8 text, including Chinese and emoji.

Percent-encode or decode URL components and special characters.

Convert CSV to JSON while preserving leading zeros and long numbers.

Convert JSON objects to an Excel workbook, preview and download XLSX.

Convert CSV to Excel text cells, preserving identifiers and multilingual text.

Convert a selected Excel worksheet to CSV with delimiter and BOM options.

Remove duplicate CSV rows or match selected columns, keeping first occurrences.

Split CSV by row count, keeping headers in every file. Preview and download.

Map fields, clean rows and join two tables in one run. Reuse local rules.

Convert JPG, PNG and WebP with transparency options.

Resize images in batches, keeping proportions or setting exact dimensions.

Turn ordered images into PDF pages using A4 or image dimensions.

Arrange and merge multiple static PDF documents into one.

Extract page ranges or split each PDF page into separate files.

Convert JPG/JPEG photos to PNG locally while keeping their dimensions.

Convert transparent PNG to JPG with a chosen background and quality.

Convert still WebP images to JPG for use in everyday apps.

Convert JPG/JPEG photos to WebP, adjust quality and compare file sizes.

Convert PNG to WebP while preserving transparency and adjusting quality.

Convert still WebP to PNG while keeping transparency and image dimensions.

Arrange JPG/JPEG photos in a PDF with one image per page.

Arrange PNG screenshots into a PDF with white backgrounds for transparency.

Create a PDF from still WebP images with A4 or image-sized pages.