Tools

Every tool in the File Viewer family, with the exact file types each one opens. Each viewer is a single HTML file that runs offline — nothing is ever uploaded. Not sure which one you need? Drop your file on the Universal Viewer and it will route you. Want to try one first? Grab a file from the samples.

Audio Viewer

Play MP3, WAV, FLAC, OGG & more right in your browser — ID3 tags, cover art & waveform. Nothing uploaded.

.mp3 .wav .flac .m4a .aac .ogg .oga .opus .weba .mka .aif .aiff .wma .mid .midi

audio-viewer.us ↗

Cert Viewer

Decode X.509 certificates & CSRs — subject, SAN, validity, key usage & fingerprints. Nothing uploaded.

.pem .crt .cer .der .csr .cert .p7b .p12 .pfx

cert-viewer.us ↗

Data Viewer

Explore JSON, YAML, CSV, TSV & XML as a collapsible tree or table, with a highlighted source view.

.json .jsonc .json5 .jsonld .ndjson .yaml .yml .toml .csv .tsv .xml .rss .atom .graphql .gql

data-viewer.us ↗

DOCX Viewer

View Word documents in your browser — formatting, tables & images intact. Nothing uploaded.

.docx .docm .dotx .dotm .doc .dot .rtf .odt

docx-viewer.us ↗

EML Viewer

Read .eml email in your browser — headers, body & attachments, with an SPF/DKIM/DMARC auth check. Nothing uploaded.

.eml .mbox .emlx .msg

eml-viewer.us ↗

EPUB Viewer

Read EPUB books in your browser — chapters + contents. Your books never leave your device.

.epub

epub-viewer.us ↗

HTML Viewer

Render HTML in a sandboxed frame, or read CSS/SCSS/JS/TS source with syntax highlighting — offline, nothing uploaded.

.html .htm .xhtml .xht .shtml .shtm .stm .hta .mhtml .mht .css .scss .sass .less .styl .pcss .postcss .js .mjs .cjs .jsx .ts .mts .cts .tsx .coffee .htaccess .htpasswd .env .ini .conf .webmanifest .map .php .phtml .asp .aspx .ascx .cshtml .vbhtml .jsp .jspx .cfm .erb .rhtml .ejs .hbs .handlebars .mustache .njk .liquid .jinja .j2 .twig .pug .jade .haml .slim .vue .svelte .astro robots.txt

html-viewer.us ↗

Image Viewer

View any image — PNG, JPEG, WebP, SVG, plus TIFF, TGA, QOI, PCX, PPM, farbfeld & DDS. Zoom, inspect metadata, export to PNG.

.png .jpg .jpeg .jpe .jfif .gif .webp .avif .svg .svgz .bmp .dib .ico .cur .tif .tiff .tga .targa .icb .vda .vst .qoi .pcx .ppm .pgm .pbm .pnm .pam .ff .dds .heic .heif .jxl .psd

image-viewer.us ↗

Log Viewer

Read .log & text files with search, level filters (ERROR/WARN/INFO), and virtual scroll for huge files. Nothing uploaded.

.log .out .err .trace .syslog

log-viewer.us ↗

Markdown Viewer

Drag & drop a Markdown or text file to render it instantly — offline, nothing uploaded.

.md .markdown .mdx .txt .rst .adoc

markdown-viewer.us ↗

PDF Viewer

Read PDFs in your browser with pdf.js — offline, nothing uploaded.

.pdf

pdf-viewer.us ↗

PPTX Viewer

Read PowerPoint decks slide by slide in your browser — text, layout & images. Nothing uploaded.

.pptx .pptm .ppsx .ppsm .potx .potm .ppt

pptx-viewer.us ↗

PUB Viewer

Read Microsoft Publisher .pub files — document metadata & text (best-effort; layout isn’t reconstructed). Nothing uploaded.

.pub

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Sheets Viewer

Open spreadsheets (.xlsx, .xls, .ods & more) as tables with sheet tabs — offline, nothing uploaded.

.123 .xlsx .xlsm .xlsb .xls .xlt .xltx .xltm .xlam .ods .fods .dif .prn .dbf .numbers .xlml .wk1 .wk3 .wks .et .uos

sheets-viewer.us ↗

Video Viewer

Play MP4, WebM, MKV & more right in your browser — keyboard shortcuts & frame capture. Nothing uploaded.

.webm .mp4 .m4v .ogv .mov .mkv .avi .wmv

video-viewer.us ↗