File & data
Merge PDFs, reshape data files and encode text — all processed locally.
- Merge PDF FilesCombine multiple PDFs into one, reorder pages before merging. Runs entirely offline in your browser.
- CSV to JSON ConverterConvert CSV or TSV into JSON with correct handling of quoted fields, embedded commas and type detection.
- Base64 Encoder & DecoderEncode and decode Base64 text, and turn any file into a Base64 data URI for embedding.
Other categories
- Image toolsConvert, resize and compress images without uploading them anywhere.
- Text toolsCount, clean and transform text for writing, editing and publishing.
- Developer toolsHashes, identifiers and encoding — the small utilities you reach for daily.
- FinanceLoan payments, interest and percentages, with the full schedule shown.
- EverydayUnits, percentages and conversions that come up constantly.
- ConstructionStairs, concrete and roofing, checked against building code limits.