Convert & compress files privately — 100% in your browser
Yes — FileFixPro converts and compresses images, PDFs, and spreadsheets 100% in your browser, free and with no account. Free file converter and compressor tools that run entirely on your device. Your files are never uploaded to any server, never stored, and never shared. Just pick a tool and go.
Browse the full file format library
260+ formats, each with its own spec, repair guide and the right in-browser tool. Start from the format you actually have.
Browse file formats
A growing library of 260 file formats — each page explains what the format is, how it breaks, how to repair it, and how to convert it. Start with the most common ones:
PDF Document
Portable document
Format overview →Word Document (Office Open XML)
Word processing document
Format overview →Excel Spreadsheet
Spreadsheet (OOXML)
Format overview →PowerPoint Presentation
Presentation (OOXML)
Format overview →PNG Image
Lossless raster
Format overview →JPEG Image
Photographic image
Format overview →MP3 Audio
Compressed music
Format overview →MP4 Video
H.264/HEVC container
Format overview →ZIP Archive
Compressed archive
Format overview →Comma-Separated Values
Tabular data
Format overview →Plain Text
Plain text
Format overview →JSON Data
Structured data
Format overview →Start with a recovery path
Tell us what went wrong, then choose a focused client-side tool. Your result stays on this page and can be printed for your records.
Diagnose a file first
Inspect size, type and metadata before choosing a repair or conversion path.
Run file diagnosis →Verify a repaired file
Generate a checksum and keep a printable verification record after recovery.
Verify integrity →Fix an extension mismatch
Compare the declared extension with the file signature and download a safe result.
Check extension →Pick a tool
Every tool below processes your file locally in the browser. Nothing leaves your machine — so your documents, photos, and spreadsheets stay private.
Image Compressor
Shrink images with a max-width control and quality slider. Resize and export as JPEG or WebP.
Open tool →Image Converter
Convert between PNG, JPEG, and WebP. Re-encode any image to the format you need.
Open tool →Image Cropper
Draw a crop box on any image and export it as PNG, JPEG, or WebP — with a free or locked aspect ratio.
Open tool →Image Watermark
Stamp text onto an image to mark ownership or draft status. Set position, opacity, and color locally.
Open tool →CSV to XLSX
Turn a CSV file into a real .xlsx workbook you can open in Excel or Sheets.
Open tool →XLSX to CSV
Export the first sheet of an .xlsx workbook to a flat CSV file.
Open tool →PDF Merge
Combine several PDF files into a single PDF, in the order you choose.
Open tool →PDF Split
Split a PDF into one small PDF file per page.
Open tool →PDF Compress
Light optimization: re-save a PDF with object streams. Honest, modest size savings — not a full recompress.
Open tool →PDF to Images
Render every page of a PDF to a downloadable PNG image, in your browser.
Open tool →PDF Encryption Check
Find out whether a PDF is password-protected before you merge, split, or convert it. Runs locally.
Open tool →File Info / Metadata
Inspect any file: name, size, MIME type, last-modified, and image width & height.
Open tool →QR Code Generator
Generate a scannable QR code from any text or URL and download it as PNG.
Open tool →File Checksum
Compute SHA-1, SHA-256, and SHA-512 of any file to verify a download — without uploading it.
Open tool →File to Base64
Turn any file into a Base64 data URL for embedding in HTML/CSS/JSON, or decode Base64 back to a file.
Open tool →File Structure Pre-Check
Scan a file’s header, format signature, and size to spot corruption, truncation, or a mismatched extension before you open it.
Open tool →File Extension Fixer
Detect a file’s real format from its signature and see the correct extension to rename it to — no upload required.
Open tool →Text Encoding / Mojibake Fixer
Re-decode a garbled text file (UTF-8, UTF-16, Windows-1252, GBK) and export a clean UTF-8 copy.
Open tool →Archive Integrity Pre-Check
Check a ZIP or RAR for a readable structure, a complete central directory, and truncated entries before you extract.
Open tool →PDF Repair Pre-Check
Confirm a PDF has a valid header, cross-reference table, and end marker — and whether it’s worth trying to recover.
Open tool →Office Document Structure Check
Verify a .docx/.xlsx/.pptx opens as a valid package and contains the parts an office app needs.
Open tool →Image Corruption Pre-Check
Try to decode a PNG/JPEG/WebP and report whether it’s intact, truncated, or beyond browser repair.
Open tool →JSON Error Repair
Find the exact spot a JSON file breaks and auto-fix common mistakes like trailing commas and unquoted keys.
Open tool →XML / HTML Structure Fix
Check markup for unbalanced tags and well-formedness errors, with suggestions to close what is open.
Open tool →Config File Checker
Lint INI, YAML, and TOML for the mistakes that break servers and apps — indentation, sections, syntax.
Open tool →Batch Rename Fixer
Clean illegal characters, spaces, and duplicates from a list of filenames and generate a rename script.
Open tool →System Error Code Lookup
Look up common Windows and file-system error codes (0x80070057, etc.) and what they mean.
Open tool →Text Line Tools
Dedupe, sort, and count lines from any pasted list — no upload, fully in your browser.
Open tool →Why process files in your browser?
Cloud converters ask you to upload sensitive files to someone else's server. FileFixPro does the opposite.
Private by design
Files are read and written on your device. They are never sent to a server.
Fast & offline
No upload wait, no network round-trip. Most operations finish in seconds.
Free, no account
No sign-up, no paywall, no email capture. Open a tool and use it instantly.
No file retention
Because we never receive your files, there is nothing for us to store or leak.
What kinds of files can I process here?
FileFixPro covers the everyday file jobs people actually need: compressing and converting images (PNG, JPEG, WebP), turning CSV files into Excel .xlsx workbooks and back, merging or splitting PDF files, lightly optimizing PDFs, rendering PDF pages to images, inspecting file metadata, and generating QR codes. All processing is performed client-side in your browser using standard web APIs such as the Canvas and File APIs.
- Images: compress with a max-width + quality slider, or convert between formats.
- Spreadsheets: CSV ⇄ XLSX conversion in the browser.
- PDF: merge multiple files, split into per-page files, light re-save optimization.
- Utilities: file metadata viewer and QR code generator.