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Comment réduire la taille de votre fichier Excel

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Coécrit par l'équipe de wikiHow

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Certains fichiers Excel peuvent occuper un espace parfois important et pour certaines opérations, il est bien d’en réduire la taille. Cela peut s’obtenir en supprimant certains éléments de mise en forme inutiles, en compressant les images que le fichier contient et en enregistrant ce dernier sous un format moins gourmand en octets.

Partie 1

Partie 1 sur 6:

Enregistrer un fichier Excel au format binaire

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Exécutez Excel en doublecliquant sur son icône (un dossier vert avec un « X » blanc), puis cliquez sur Fichier et enfin sur Ouvrir . Sélectionnez alors le fichier.
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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/1\/11\/Reduce-Size-of-Excel-Files-Step-3-Version-7.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-3-Version-7.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/11\/Reduce-Size-of-Excel-Files-Step-3-Version-7.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-3-Version-7.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/4\/42\/Reduce-Size-of-Excel-Files-Step-5-Version-7.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-5-Version-7.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/42\/Reduce-Size-of-Excel-Files-Step-5-Version-7.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-5-Version-7.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
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Les fichiers enregistrés sous ce format sont nettement plus petits en taille que les fichiers classiques d’Excel (en .xls ).
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La version réduite de votre fichier Excel est alors enregistrée sur le disque dur de votre ordinateur.

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Partie 2

Partie 2 sur 6:

Supprimer la mise en forme des colonnes et des lignes vides

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Exécutez Excel en doublecliquant sur son icône (un dossier vert avec un « X » blanc), puis cliquez sur Fichier et enfin sur Ouvrir : sélectionnez votre fichier.
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2
Sélectionnez toutes les lignes vides. Pour cela, cliquez sur la référence chiffrée (à gauche) de la première ligne vide, puis faites la combinaison Ctrl + Maj + ↓ (Windows) ou ⌘ + Maj + ↓ (Mac).
- Les touches directionnelles sont généralement dans le coin inférieur droit du clavier.
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Sous macOS, cliquez sur
Modifier dans la barre des menus.
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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/3\/39\/Reduce-Size-of-Excel-Files-Step-12-Version-6.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-12-Version-6.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/3\/39\/Reduce-Size-of-Excel-Files-Step-12-Version-6.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-12-Version-6.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

Toutes les cellules non utilisées des lignes sont nettoyées de leur mise en forme éventuelle.
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6
Sélectionnez toutes les colonnes vides. Pour cela, cliquez sur la référence littérale (en haut de colonne) de la première colonne vide, puis faites la combinaison Ctrl + Maj + → (Windows) ou ⌘ + Maj + → (Mac).
- Les touches directionnelles sont généralement dans le coin inférieur droit du clavier.
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Sous macOS, cliquez sur
Modifier dans la barre des menus.
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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/3\/3e\/Reduce-Size-of-Excel-Files-Step-16-Version-3.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-16-Version-3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/3\/3e\/Reduce-Size-of-Excel-Files-Step-16-Version-3.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-16-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

Dès lors, toutes les cellules non utilisées des colonnes sont nettoyées de leur mise en forme éventuelle.

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Partie 3

Partie 3 sur 6:

Supprimer la mise en forme conditionnelle dans Excel

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Exécutez Excel en doublecliquant sur son icône (un dossier vert avec un « X » blanc), puis cliquez sur Fichier et enfin sur Ouvrir : sélectionnez votre fichier.
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/b\/b4\/Reduce-Size-of-Excel-Files-Step-18-Version-3.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-18-Version-3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/b4\/Reduce-Size-of-Excel-Files-Step-18-Version-3.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-18-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/2\/2d\/Reduce-Size-of-Excel-Files-Step-19-Version-3.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-19-Version-3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/2d\/Reduce-Size-of-Excel-Files-Step-19-Version-3.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-19-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

Cette fonctionnalité est dans le groupe Style de l’onglet.
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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/d\/d6\/Reduce-Size-of-Excel-Files-Step-21-Version-3.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-21-Version-3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/d6\/Reduce-Size-of-Excel-Files-Step-21-Version-3.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-21-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

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Partie 4

Partie 4 sur 6:

Supprimer la mise en forme des cellules vides sous Windows

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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/4\/47\/Reduce-Size-of-Excel-Files-Step-22-Version-2.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-22-Version-2.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/47\/Reduce-Size-of-Excel-Files-Step-22-Version-2.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-22-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

Exécutez Excel en doublecliquant sur son icône (un dossier vert avec un « X » blanc), puis cliquez sur Fichier et enfin sur Ouvrir : sélectionnez votre fichier.
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/d\/db\/Reduce-Size-of-Excel-Files-Step-23.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-23.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/db\/Reduce-Size-of-Excel-Files-Step-23.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-23.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/8\/83\/Reduce-Size-of-Excel-Files-Step-24.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-24.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/83\/Reduce-Size-of-Excel-Files-Step-24.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-24.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

L’icône est dans le groupe Édition de l’onglet Accueil .
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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/2\/2e\/Reduce-Size-of-Excel-Files-Step-26.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-26.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/2e\/Reduce-Size-of-Excel-Files-Step-26.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-26.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/1\/17\/Reduce-Size-of-Excel-Files-Step-27.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-27.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/17\/Reduce-Size-of-Excel-Files-Step-27.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-27.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/1\/1e\/Reduce-Size-of-Excel-Files-Step-28.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-28.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/1e\/Reduce-Size-of-Excel-Files-Step-28.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-28.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

Toutes les cellules vides sont alors sélectionnées.
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Son icône est une gomme.
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Partie 5

Partie 5 sur 6:

Supprimer la mise en forme des cellules vides sous macOS

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Exécutez Excel en doublecliquant sur son icône (un dossier vert avec un « X » blanc), puis cliquez sur Fichier et enfin sur Ouvrir : sélectionnez votre fichier.
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/c\/cd\/Reduce-Size-of-Excel-Files-Step-32.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-32.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/cd\/Reduce-Size-of-Excel-Files-Step-32.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-32.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

C’est le troisième menu dans la barre des menus d’Excel en haut de l’écran.
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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/1\/1b\/Reduce-Size-of-Excel-Files-Step-34.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-34.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/1b\/Reduce-Size-of-Excel-Files-Step-34.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-34.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/4\/4c\/Reduce-Size-of-Excel-Files-Step-35.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-35.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/4c\/Reduce-Size-of-Excel-Files-Step-35.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-35.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/2\/24\/Reduce-Size-of-Excel-Files-Step-36.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-36.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/24\/Reduce-Size-of-Excel-Files-Step-36.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-36.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/3\/37\/Reduce-Size-of-Excel-Files-Step-37.jpg\/v4-460px-Reduce-Size-of-Excel-Files-Step-37.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/3\/37\/Reduce-Size-of-Excel-Files-Step-37.jpg\/v4-728px-Reduce-Size-of-Excel-Files-Step-37.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

Toutes les cellules vides sont alors en surbrillance.
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Partie 6

Partie 6 sur 6:

Compresser des images dans Excel

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Exécutez Excel en doublecliquant sur son icône (un dossier vert avec un « X » blanc), puis cliquez sur Fichier et enfin sur Ouvrir : sélectionnez votre fichier.
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2
Ouvrez la boite de dialogue de la compression d’images. Pour cela :
- sous Windows, cliquez sur une image, puis sur l’onglet Format . Dans le groupe Ajuster , cliquez sur Compresser les images ;
- sous macOS, cliquez sur Fichier , puis sur Réduire la taille de fichier .
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Les images contenues dans le fichier ont été bien compressées et toutes les données inutiles liées aux images ont été supprimées.

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