Hvad er EXPRESS-filformatet?
En .express-fil er en præsentation lavet med BlackBerry Express, en slide-app til BlackBerry 10-telefoner. BlackBerry Sweden byggede appen og udgav den som en gratis beta på BlackBerry World i november 2013 og opdaterede den til version 1.0.1.16 i december samme år. Ideen var at lade brugeren sammensætte et diasshow på en telefon på få minutter, sortere indhold i kapitler, sektioner, punktopstillinger og tekst, og derefter præsentere det på enheden eller på en ekstern skærm via HDMI.
Trods filtypenavnet er en .express-fil ikke en proprietær binær fil. Det er et .tar-arkiv under et andet navn. Indeni ligger et JSON-manifest, der registrerer slide-strukturen og teksten, sammen med kopier af hvert billede, forfatteren importerede. Der er ingen komprimering eller kryptering, hvilket er grunden til, at indholdet kommer rent ud, når du behandler filen som et arkiv.
Sikkerhed og tryghed
RISIKO: LOWAn .express file is a passive TAR archive of images and JSON text, so it does not execute code. The main risk is practical rather than security-related: the app that created it is discontinued, so opening one now means extracting its parts manually. As with any archive from an unknown source, scan it before unpacking, since a TAR container could in principle hold unexpected files.
Formatdetaljer
kort fortalt- ExpressionEngine / generic project files - Some tools and generators emit files named with an .express suffix as internal project or config files; these are unrelated to BlackBerry Express presentations.
- Express.js scaffolding - Users sometimes informally refer to Express (Node.js) app files as 'express files', but the web framework does not define an .express extension.
Programmer der åbner EXPRESS-filer
Windows2 apps
WinRAR
Betalt Rename the file to .tar and open it in WinRAR to browse and extract the presentation's images and JSON layout. 
7-Zip
Open-source Rename the file from .express to .tar, right-click it and choose 7-Zip then Extract to pull out the JSON manifest and the embedded images. 
macOS2 apps
The Unarchiver
Gratis Change the extension to .tar, then open the file with The Unarchiver to unpack the images and JSON contents. 
Archive Utility (built-in)
Indbygget Rename to .tar and double-click; macOS Archive Utility expands the TAR archive into a folder of its members. 
Linux2 apps
tar (GNU tar)
Open-source Run tar -xvf yourfile.express in a terminal to extract the JSON manifest and images without even renaming the file.
GNOME Archive Manager (File Roller)
Open-source Rename to .tar and open in Archive Manager to browse and extract the presentation's contents graphically. Tekniske detaljer
dyb specifikation| Container | TAR (Tape Archive) |
| Compression | None (TAR concatenates files without compression) |
| Structure | A single .express file is a TAR archive holding a JSON manifest that describes the presentation (chapters, sections, slides, text, layout) plus copies of the images imported into the deck. Renaming the file to .tar and extracting it exposes these members. |
| Encoding | JSON manifest is UTF-8 text; images stored in their original raster formats |
| Integrity | Per-member header checksum inherent to the TAR format; no document-level signature |
| Platforms | BlackBerry 10 |
| Typical size | Ranges from tens of kilobytes for a text-only deck to several megabytes when high-resolution images are embedded |
| Notes | The app organized content into chapters, sections, bullet points and text, and could output to a BlackBerry 10 screen or an external display over HDMI. The format was never publicly documented; its TAR/JSON internals were reverse-engineered by users trying to recover their slides after the app was pulled. |
| Udgivet | 2013 |
| Seneste version | App v1.0.1.16 (December 2013) |
| Specifikation | fileinfo.com |
EXPRESS-konverteringer
Fællesskabets Q&A
spurgt af brugereIngen spørgsmål endnu - vær den første til at spørge om EXPRESS-filer.
Ofte stillede spørgsmål
Hvordan åbner jeg en .express-fil på min computer?
.tar, og åbn den derefter med et hvilket som helst arkivværktøj såsom 7-Zip, The Unarchiver eller kommandoen tar. Indeni finder du præsentationens billeder og en JSON-fil, der beskriver dine slides.Kan jeg konvertere en .express-fil til PowerPoint?
Hvilket program oprettede .express-filer?
Er en .express-fil virkelig bare et TAR-arkiv?
.tar og udpakke den, hvilket afslører et JSON-manifest plus de importerede billeder.
