Kri is how a word is pronounced. Ktiv is how a word is written. Sometimes, these versions are different. Below are all instances of differences in the Book of Esther. The kri versions are in [brackets], and the ktiv versions are in (parentheses):
וַיֹּ֣אמֶר (מומכן) [מְמוּכָ֗ן] לִפְנֵ֤י הַמֶּ֙לֶךְ֙ וְהַשָּׂרִ֔ים לֹ֤א עַל־הַמֶּ֙לֶךְ֙ לְבַדּ֔וֹ עָוְתָ֖ה וַשְׁתִּ֣י הַמַּלְכָּ֑ה כִּ֤י עַל־כׇּל־הַשָּׂרִים֙ וְעַל־כׇּל־הָ֣עַמִּ֔ים אֲשֶׁ֕ר בְּכׇל־מְדִינ֖וֹת הַמֶּ֥לֶךְ אֲחַשְׁוֵרֽוֹשׁ׃
Thereupon Memucan declared in the presence of the king and the ministers: “Queen Vashti has committed an offense not only against Your Majesty but also against all the officials and against all the peoples in all the provinces of King Ahasuerus.
וַיְהִ֗י (באמרם) [כְּאׇמְרָ֤ם] אֵלָיו֙ י֣וֹם וָי֔וֹם וְלֹ֥א שָׁמַ֖ע אֲלֵיהֶ֑ם וַיַּגִּ֣ידוּ לְהָמָ֗ן לִרְאוֹת֙ הֲיַֽעַמְדוּ֙ דִּבְרֵ֣י מׇרְדֳּכַ֔י כִּֽי־הִגִּ֥יד לָהֶ֖ם אֲשֶׁר־ה֥וּא יְהוּדִֽי׃
When they spoke to him day after day and he would not listen to them, they told Haman, in order to see whether Mordecai’s resolve would prevail; for he had explained to them that he was a Jew.
(ותבואינה) [וַ֠תָּב֠וֹאנָה] נַעֲר֨וֹת אֶסְתֵּ֤ר וְסָרִיסֶ֙יהָ֙ וַיַּגִּ֣ידוּ לָ֔הּ וַתִּתְחַלְחַ֥ל הַמַּלְכָּ֖ה מְאֹ֑ד וַתִּשְׁלַ֨ח בְּגָדִ֜ים לְהַלְבִּ֣ישׁ אֶֽת־מׇרְדֳּכַ֗י וּלְהָסִ֥יר שַׂקּ֛וֹ מֵעָלָ֖יו וְלֹ֥א קִבֵּֽל׃
When Esther’s maidens and eunuchs came and informed her, the queen was greatly agitated. She sent clothing for Mordecai to wear, so that he might take off his sackcloth; but he refused.
וַיַּגֶּד־ל֣וֹ מׇרְדֳּכַ֔י אֵ֖ת כׇּל־אֲשֶׁ֣ר קָרָ֑הוּ וְאֵ֣ת ׀ פָּרָשַׁ֣ת הַכֶּ֗סֶף אֲשֶׁ֨ר אָמַ֤ר הָמָן֙ לִ֠שְׁק֠וֹל עַל־גִּנְזֵ֥י הַמֶּ֛לֶךְ (ביהודיים) [בַּיְּהוּדִ֖ים] לְאַבְּדָֽם׃
and Mordecai told him all that had happened to him, and all about the money that Haman had offered to pay into the royal treasury for the destruction of the Jews.
בַּיּ֣וֹם הַה֗וּא נָתַ֞ן הַמֶּ֤לֶךְ אֲחַשְׁוֵרוֹשׁ֙ לְאֶסְתֵּ֣ר הַמַּלְכָּ֔ה אֶת־בֵּ֥ית הָמָ֖ן צֹרֵ֣ר (היהודיים) [הַיְּהוּדִ֑ים] וּמׇרְדֳּכַ֗י בָּ֚א לִפְנֵ֣י הַמֶּ֔לֶךְ כִּֽי־הִגִּ֥ידָה אֶסְתֵּ֖ר מַ֥ה הוּא־לָֽהּ׃
That very day King Ahasuerus gave the property of Haman, the enemy of the Jews, to Queen Esther. Mordecai presented himself to the king, for Esther had revealed how he was related to her.
וַיֹּ֨אמֶר הַמֶּ֤לֶךְ אֲחַשְׁוֵרֹשׁ֙ לְאֶסְתֵּ֣ר הַמַּלְכָּ֔ה וּֽלְמׇרְדֳּכַ֖י הַיְּהוּדִ֑י הִנֵּ֨ה בֵית־הָמָ֜ן נָתַ֣תִּי לְאֶסְתֵּ֗ר וְאֹתוֹ֙ תָּל֣וּ עַל־הָעֵ֔ץ עַ֛ל אֲשֶׁר־שָׁלַ֥ח יָד֖וֹ (ביהודיים) [בַּיְּהוּדִֽים]׃
Then King Ahasuerus said to Queen Esther and Mordecai the Jew, “I have given Haman’s property to Esther, and he has been impaled on the stake for scheming against the Jews.
פַּתְשֶׁ֣גֶן הַכְּתָ֗ב לְהִנָּ֤תֵֽן דָּת֙ בְּכׇל־מְדִינָ֣ה וּמְדִינָ֔ה גָּל֖וּי לְכׇל־הָעַמִּ֑ים וְלִהְי֨וֹת (היהודיים) [הַיְּהוּדִ֤ים] (עתודים) [עֲתִידִים֙] לַיּ֣וֹם הַזֶּ֔ה לְהִנָּקֵ֖ם מֵאֹיְבֵיהֶֽם׃
The text of the document was to be issued as a law in every single province: it was to be publicly displayed to all the peoples, so that the Jews should be ready for that day to avenge themselves on their enemies.
וַיִּֽקָּהֲל֞וּ (היהודיים) [הַיְּהוּדִ֣ים] אֲשֶׁר־בְּשׁוּשָׁ֗ן גַּ֠ם בְּי֣וֹם אַרְבָּעָ֤ה עָשָׂר֙ לְחֹ֣דֶשׁ אֲדָ֔ר וַיַּֽהַרְג֣וּ בְשׁוּשָׁ֔ן שְׁלֹ֥שׁ מֵא֖וֹת אִ֑ישׁ וּבַ֨בִּזָּ֔ה לֹ֥א שָׁלְח֖וּ אֶת־יָדָֽם׃
and the Jews in Shushan mustered again on the fourteenth day of Adar and slew three hundred men in Shushan. But they did not lay hands on the spoil.
(והיהודיים) [וְהַיְּהוּדִ֣ים] אֲשֶׁר־בְּשׁוּשָׁ֗ן נִקְהֲלוּ֙ בִּשְׁלוֹשָׁ֤ה עָשָׂר֙ בּ֔וֹ וּבְאַרְבָּעָ֥ה עָשָׂ֖ר בּ֑וֹ וְנ֗וֹחַ בַּחֲמִשָּׁ֤ה עָשָׂר֙ בּ֔וֹ וְעָשֹׂ֣ה אֹת֔וֹ י֖וֹם מִשְׁתֶּ֥ה וְשִׂמְחָֽה׃
But the Jews in Shushan mustered on both the thirteenth and fourteenth days, and so rested on the fifteenth, and made it a day of feasting and merrymaking.)
וַיָּ֩שֶׂם֩ הַמֶּ֨לֶךְ (אחשרש) [אֲחַשְׁוֵר֧וֹשׁ] ׀ מַ֛ס עַל־הָאָ֖רֶץ וְאִיֵּ֥י הַיָּֽם׃
King Ahasuerus imposed tribute on the mainland and the islands.