Create ZIP archives from your files right in your browser. Bundle loose files into one archive.zip with DEFLATE compression — local JSZip work, unlimited saves.
Runs on JSZip
Content reviewed October 2026 · About Toolzum
Convert CSV files into queryable SQLite databases in your browser. Turn 100k-row exports into SELECT-able tables — local sql.js work, unlimited saves.
Convert between XLSX workbooks and CSV files preserving sheets and encoding. Move data across Excel and pipelines — local SheetJS work, unlimited saves.
Convert calendar ICS files to CSV rows — audit events in spreadsheets. Turn a year of meetings into data — local parsing, unlimited saves.
Burn text watermarks into a video with 5 position presets (bottom-right default, fixed 24px white on semi-transparent black box). Brand one clip at a time — local FFmpeg work, unlimited saves.
Export 14 fixed PNG sizes (1024, 512, 192, 180, 167, 152, 120, 87, 76, 60, 58, 40, 32, 16) from pasted SVG code or one uploaded image (PNG/SVG/JPEG), downscaled with high-quality smoothing into a flat app-icons.zip. 5 free generations per session; Pro unlimited — local Canvas work.
A single archive.zip from the files you add, compressed with DEFLATE level 6 via JSZip — duplicate names auto-rename to "name (1).ext". It packs files, it does not convert existing archives.
Not supported — this tool builds ZIP files only. It cannot read, write, or repack TAR, GZ, or 7z archives.
Hundreds of megabytes pack locally; gigabyte batches strain mobile browsers. Desktop handles big batches with patience.
No — packing runs locally in your browser. The ZIP download passes the standard free-usage gate.
Document Converter
Organize documents across PDF, Word, Excel, PowerPoint, Image, HTML, EPUB, and HEIC filename targets. Files queue locally with a 150MB per-file intake cap — your files never leave your device.
Bulk E-Book Converter
Convert EPUB ebooks to paginated PDF, or PDF ebooks back to EPUB — real local text extraction. MOBI/Kindle files are rejected (repack them to EPUB in Calibre first); images-only books need OCR.