File Conversion Pre-flight Checklist

FileFixPro · Convert & Compress Safely

Run through these steps before you convert, compress, or merge any file — especially anything private. Everything on FileFixPro runs 100% in your browser; nothing is uploaded. Print this sheet and tick each box as you go.

1 · Before you convert

Identify the source format. Confirm what the file actually is (not just its extension) with File Info.

Pick the right target format for the job — see the decision table below.

Make a backup copy of the original before any conversion. Never overwrite the only copy.

Decide edit-vs-lock: will the recipient change it (use a working format) or must it look identical (use PDF)?

2 · Choose the target format

If the file is…	Use	Why
A photograph	JPG / WebP	Small, smooth gradients; WebP is smaller for the web
A logo, screenshot, or needs transparency	PNG	Crisp edges, lossless, supports transparent background
A document someone must edit	DOCX	Recipient can rewrite content and formatting
A document that must look identical	PDF	Layout, fonts, and pages are locked
Data fed to software / import	CSV	Universal plain-text list every system reads
Data a human will work in	XLSX	Sheets, formulas, and styling preserved
Sending to other people	ZIP	Opens everywhere with no extra software
You control both ends, want smallest size	7Z	Stronger compression than ZIP

3 · Convert & verify (locally)

Run the conversion in-browser — images (Image Converter / Image Compressor), sheets (CSV to XLSX), PDFs (Merge / Split / Compress).

Verify the output with File Info (size, dimensions, type) before sending.

Checksum archives you’ll store or share with File Checksum (SHA-256) and pre-check with Archive CRC Precheck.

Confirm the recipient can open it (format + software) before you hit send.

4 · Record this job

File / batch
From → To
Tool used
Backup location
Verified? (checksum / open test)
Sent to / stored at