Novel TranslatorNovel Translator
PricingLibraryContact Us
EPUB Translation

Translate EPUB books while preserving formatting

TXT Translation

Translate plain text files and novels

NSFW Translation

Translate adult content with specialized handling

Chinese Novel Translation

Translate xianxia, wuxia, and cultivation novels

Japanese Novel Translation

Translate light novels, web novels, and isekai

Korean Novel Translation

Translate Korean web novels and manhwa

Thai Novel Translation

Translate Thai novels and Y-novels

Vietnamese Novel Translation

Translate Vietnamese novels and web fiction

Indonesian Novel Translation

Translate Indonesian novels and stories

Arabic Novel Translation

Translate Arabic novels and literature

Traditional Chinese Translation

Translate Traditional Chinese novels

Spanish Novel Translation

Translate Spanish novels and literatura

French Novel Translation

Translate French novels and romans

Book Translation

Professional book translation for $2.99 average

MTL Translation

Fix broken machine translations into perfect prose

View All Applications

Browse all translation services

Name Generator

Generate culturally appropriate Asian fantasy names

Realm Generator

Generate cultivation realm titles for Xianxia stories

Plot Generator

Generate compelling story frameworks and plot summaries

Technique Generator

Create unique martial arts and cultivation technique names

Backstory Generator

Generate rich character backgrounds and motivations

Trope Generator

Generate random web novel trope combinations for inspiration

Quote Generator

Create epic quotes and humorous character dialogues

Terminology Database

Searchable database of Wuxia, Xianxia, and Murim terms

Pinyin Converter

Convert Chinese and Korean text to romanization

Xianxia Profile Generator

Create your own Xianxia Profile Picture and Backstory

Reading Time Calculator

Calculate reading time for light novels and web novels

Light Novel Title Generator

Generate hilariously long light novel titles

LN Release Calendar

Track upcoming Japanese light novel releases

Paragraph Line Splitter

Split text into clean paragraphs with customizable rules

CJK Text Formatter

Convert vertical CJK text to horizontal format

Chinese Discord PFP

Generate Chinese novel-themed Discord avatars with AI

Japanese Discord PFP

Create anime-style Discord profile pictures with AI

Korean Discord PFP

Design manhwa-inspired Discord avatars with AI

EPUB Split & Merge

Split large EPUBs or merge multiple files into one

Novel File Cleaner

Clean and format EPUB and TXT files for better readability

PDF to TXT Converter

Convert PDF documents to plain text format

Novel TranslatorNovel Translator
  1. Library
  2. I Killed the Demon King. It Was a Mistake
I Killed the Demon King. It Was a Mistake

I Killed the Demon King. It Was a Mistake

By 박루트

3.7
CompletedkoreanWeb Novel

Genres

Browse Library →
actionadventurecomedydramafantasyharemmartial artspsychologicalseinen
Chapters

364 chapters

Started

2024

Description

I was born as a Demon after falling into the game world and a whole 3 years have passed. The nameless Allied Forces soldier, Mil of the Sky Knight Order, Barbarian Knight Barre. And the doppelganger and spy of the Demon King’s army, Seo-han, are all me. But I… “Y- you, what the heck… Bam!” I ended up blowing off the Demon King’s head. Huh? This isn’t right.

Tags

Click any tag to find similar novels in the library

beautiful female leadcharismatic protagonistclever protagonistcunning protagonistdemi humansdemon lorddemonsdrugsfantasy worldhot blooded protagonisthumanoid protagonistkingdomsknightsmale protagonistmultiple identitiespoliticsroyaltyruthless protagonistshapeshifterssuccubustransformation abilitytransmigrationvampires

Publication Information

Original Publisher
kakaopage
Original Language
korean
Type
Web Novel

I Killed the Demon King. It Was a Mistake Review & Spoilers - Novel Translator

My Thoughts on I Killed the Demon King. It Was a Mistake

I dove into "I Killed the Demon King. It Was a Mistake" with a healthy dose of curiosity. The title alone promised a wild ride, and the tags suggested a blend of action, comedy, and a dash of the psychological. After spending some time with it, I can say it definitely has its strengths, though a few aspects held it back from being a complete knockout for me.

First Impressions

The beginning is definitely attention-grabbing. We're introduced to a protagonist who isn't your typical isekai pushover. He's described as a brutal and cunning individual, not afraid to get his hands dirty. I appreciated this fresh take, and it immediately set a different tone than many other novels in the genre. The initial world-building, focused around a single city, felt adequate for the early stages, leaving room for expansion.

What Works Well

The MC is undoubtedly the strongest aspect. His no-nonsense attitude and ability to strategize, combined with his sheer force, make him a compelling character to follow. I like that he doesn't just blunder through situations but actually thinks ahead. I also found myself enjoying the increasing complexity as the story progressed. The author seems to ramp up the difficulty, forcing the MC to make critical decisions with significant consequences. Also, the enemies aren't just cardboard cutouts; they have their own motivations, adding depth to the narrative.

Areas of Concern

My biggest reservation stems from the MC's mind-reading ability. While it's presented early on, I feel it undermines the tension in many situations. Knowing everyone's intentions upfront can flatten character interactions and remove a sense of mystery. It felt like potential for complex plots and intriguing character dynamics was being sacrificed for the sake of convenience. Also, I noticed the translation could use some polish. The inconsistent use of the term "demon" to refer to different species/factions can be confusing, especially when they're discussed in close proximity.

⚠️ Spoiler Warning

Click "Reveal" to show spoiler content

Final Verdict

"I Killed the Demon King. It Was a Mistake" is a flawed but entertaining read. The charismatic protagonist and increasingly challenging plot are definite highlights. However, the mind-reading ability and translation issues do detract from the overall experience. If you're looking for a novel with a strong, proactive MC and don't mind overlooking some inconsistencies, this might be worth checking out. I'd give it a solid 3.5 out of 5 stars.

How to Download I Killed the Demon King. It Was a Mistake Web Novel

Learn how to download and convert I Killed the Demon King. It Was a Mistake into EPUB format for translation. Our step-by-step video guide shows you how to use WebToEpub browser extension to download your novel online.

  • Search for raws by checking beneath the title with the original name
  • Download from web novel sites using WebToEpub browser extension
  • Convert to EPUB format compatible with Novel Translator
  • Works with a large amount of online novel websites

Related Novels

My Demons

My Demons

파랑손

3.9
actionadventurefantasy

Description coming soon.

I’m a Max-Level RegressorCompleted

I’m a Max-Level Regressor

청초

2.9
actionadventurecomedy

Description coming soon.

Novel Translator

Novel Translator

Stop waiting months for translations. Read any novel in hours. 31 languages. Full NSFW support. Join readers translating daily.

Resources

  • Features
  • Showcases
  • Pricing
  • Pricing Calculator
  • Novel Tools
  • Blog
  • Library

Friends

  • Webnovels AI
  • Lightnovels AI
  • Datingprofiles AI
  • KQM
  • KQM HSR

FREE Tools

  • Name Generator
  • Realm Generator
  • Plot Generator
  • Technique Generator
  • Backstory Generator
  • Xianxia Profile Generator

© 2025 • Novel Translator. All rights reserved.

  • Privacy Policy
  • Terms of Service