Which file types can it preview?

Images, text files, PDFs, audio and video — covering the most common formats you'd want to quickly check before opening properly.

Is the file uploaded to a server to generate the preview?

No, previewing happens entirely in your browser — the file never leaves your device.

What happens if I preview a file type it doesn't support?

It shows the file's basic info (name, size, type) even without a visual preview, rather than failing outright.

Does File Preview Viewer upload my files to a server?

No. File Preview Viewer runs entirely in your browser using on-device processing, your files never leave your device.

File Preview Viewer

Preview images, text, PDF, audio and video files instantly, without uploading them anywhere.

Runs in your browser

Drop any file here

Choose File

Runs entirely in your browser, nothing is uploaded to a server.

About this tool

Opening a file just to check what's inside it — is this the right image, does this PDF have the pages I expect, is this the right audio clip — usually means downloading it into whatever app handles that format first. This tool previews images, text, PDF, audio and video files instantly, right in your browser, without uploading them anywhere or needing a separate app installed, so you can quickly confirm a file's contents before committing to open or share it properly.

Frequently asked questions

File Metadata Viewer

View a file's name, size, type and last-modified date.

File Type Detector

Detect a file's true type from its byte signature, not just its extension.

Zip & Unzip Files

Combine files into a ZIP archive, or extract files from one.

File Size Converter

Convert between bytes, KB, MB, GB, and their binary (KiB/MiB/GiB) equivalents.

Duplicate File Finder

Find identical files among a batch by comparing their content hash.

Batch File Renamer

Rename many files at once using a pattern, and download them as a ZIP.

File Extension Changer

Rename a file's extension without converting its actual format.

Hex Viewer

View the raw bytes of any file as a hex and ASCII dump.

File to Base64 Converter

Encode any file as Base64, or decode Base64 back into a downloadable file.

GZIP Compressor

Compress or decompress a file using GZIP.

File Checksum Verifier

Verify a downloaded file against a published SHA checksum.

Archive Format Converter

Convert between ZIP and uncompressed TAR archives.

PDF Tools

Merge, split, compress and convert PDF files.

Image Tools

Compress, resize, crop and convert images.

Link & QR Tools

Shorten links and generate QR codes and barcodes.

Audio Tools

Convert audio files and turn text into speech, or speech into text.

Video Tools

Compress and process video files, right in your browser.

Developer Tools

JSON, encoding, hashing and text utilities for developers.

SEO & Web Tools

Meta tags, sitemaps, schema markup and other on-page SEO utilities.

Data & Spreadsheet Tools

Clean, convert and inspect CSV, TSV and tabular data.

Business Tools

Invoices, quotations, receipts and other business documents.

Social Media Tools

Resize images for social platforms, count hashtags and preview posts.