File Handling
How Convurter handles files.
Most current public tools process selected files directly in your browser. For those tools, Convurter does not upload your files to a server to complete the task.
Browser-local tools
Image, PDF page operation, ZIP, checksum, file inspection, DOCX/ODT document review, PDF inspectors, image inspectors, QR, barcode, and text/data tools use browser APIs and local JavaScript runners when marked as no-upload tools. JSON/CSV to XLSX tools generate the workbook in the browser from pasted text; they do not upload spreadsheet source files.
Readiness tools such as PDF-to-Word readiness, OCR readiness, scanned PDF detection, PDF text-layer checks, HEIC support checks, Office conversion checklists, and HTML-to-PDF render readiness are also browser-local. They inspect signals and explain risks; they do not convert, OCR, redact, or upload the file. Visible PDF signing is browser-local and only adds a visible mark; it does not create certificate signatures, audit trails, identity verification, or legal-compliance guarantees.
Browse the browser-local tools directory or read runtime modes explained for a plain-language breakdown. For mixed upload handoffs, use Portal Preflight to route through file identity, PDF, image, archive, filename, chunking, and manifest checks before retrying.
Temporary PDF jobs
PDF rendering, PDF text extraction, embedded image extraction, and PDF compression use temporary upload-backed jobs. Convurter creates a short-lived upload URL, queues the job, stores temporary input and output artifacts, and returns an expiring download link. The workbench also exposes a delete action that removes the temporary input and output object prefixes and marks the job expired/deleted.
Browse temporary server-job tools, review delete and expiry behavior, or use upload troubleshooting when a job is rejected.
Temporary Office jobs
DOCX to PDF, PDF to Word, XLSX to PDF, and PPTX to PDF use the same temporary server job contract as PDF jobs. Conversion runs in the worker path and returns one expiring download. PDF to Word rejects scanned or image-only PDFs and routes that work toward OCR. XLSX and PPTX outputs must be reviewed for sheets, charts, slides, fonts, page breaks, and layout shifts.
Temporary OCR jobs
Image to Text and PDF OCR use temporary upload-backed OCR jobs. Image OCR accepts JPG, PNG, and WebP inputs and returns plain text. PDF OCR accepts unlocked PDFs, renders pages for recognition, and returns plain text with page separators. Image OCR and PDF OCR currently return plain text. Searchable PDFs, receipt-specific OCR, handwriting recognition, and broad language packs need additional review before they are offered.
Temporary image and HTML jobs
HEIC to JPG, HEIC to PNG, and HTML to PDF use temporary upload-backed jobs. HEIC conversion uses the worker image engine and may reject unsupported HEIC/HEIF variants. HTML to PDF accepts uploaded or pasted HTML only; arbitrary URL capture, private-network fetching, scripts, frames, plugin objects, and external network resources are blocked.
Tools that need extra review
Some workflows need stronger processors and output review before Convurter offers them as production tools. For those cases, Convurter may provide readiness checks and guides until the actual conversion path is reliable.
Limits
File limits are intentional. They keep the page responsive, protect your browser from oversized work, and keep free tools inexpensive to operate.
Review current limits by tool family.
Analytics
Tool analytics use safe metadata such as tool id, family, runner, file count, size bucket, format, success, failure, copy, and download events. Raw file contents, pasted text, filenames, URLs, passwords, tokens, and generated outputs are not logged.
Downloads
Finished browser-local files are created in your browser and downloaded by your browser. Temporary server job outputs are stored only as expiring artifacts for the download window. Recent server job continuity stores the job id, tool id, status, and expiration time only; it does not store filenames or file contents.
Ads and controls
Ads must stay outside upload zones, tool controls, result controls, and download links. Manual ad placements are disabled unless configured explicitly; tool workbenches should remain usable without misleading clicks around conversion or deletion actions.
Additional upload tools
Additional upload tools may need server processing for OCR, broader Office conversion, media conversion, or heavier PDF work. Those tools should be labeled before you choose files and use the temporary job path rather than silent background uploads.
Sensitive files
Avoid using free web tools for secrets, regulated records, legal documents, medical records, financial files, or private credentials unless you understand the risk.