Filemivo
PNG to JPGConvert PNG images to compact JPG files locally.→JPG to PNGConvert JPG images to lossless PNG files locally.→PNG to WebPConvert PNG images to efficient WebP files locally.→WebP to PNGConvert WebP images to PNG directly in your browser.→JPG to WebPConvert JPG images to efficient WebP files locally.→WebP to JPGConvert WebP images to broadly supported JPG files locally.→Resize imageResize one or many images to exact pixel dimensions.→Compress imageReduce image file size with an adjustable quality setting.→Crop imageCrop images by entering precise coordinates and dimensions.→Rotate imageRotate images clockwise or counterclockwise without uploading.→View metadataInspect available image and EXIF metadata privately.→Remove metadataCreate a clean image copy without embedded metadata.→Format JSONPretty-print or minify JSON in your browser.→Validate JSONValidate JSON syntax and locate errors.→JSON to CSVConvert arrays of JSON objects into CSV.→CSV to JSONConvert CSV rows into structured JSON objects.→JSON to YAMLConvert valid JSON into readable YAML.→YAML to JSONConvert YAML documents into formatted JSON.→JSON to XMLConvert JSON data into an XML document.→XML to JSONConvert XML documents into formatted JSON.→Base64Encode text or files as Base64 and decode Base64 locally.→URL encodeEncode or decode URL components safely.→Generate hashGenerate SHA-256, SHA-384 or SHA-512 hashes using Web Crypto.→Generate UUIDGenerate cryptographically strong UUID v4 identifiers.→Unix timestampConvert between Unix timestamps and human-readable dates.→Compare textCompare two blocks of text line by line.→Count wordsCount words, characters, sentences and lines instantly.→Deduplicate linesRemove repeated lines while preserving the first occurrence.→Sort linesSort lines alphabetically, naturally or in reverse.→

Private browser tool

Remove Duplicate Lines

Remove repeated lines while preserving the first occurrence.

✓ Local processing✓ No uploads✓ No account

Next step

Continue working with your file

Browse all tools →
TEXT→

Sort lines

Sort lines alphabetically, naturally or in reverse.

TEXT→DIFF
→

Compare text

Compare two blocks of text line by line.

TEXT→COUNTS
→

Count words

Count words, characters, sentences and lines instantly.

Simple by design

From file to result in three steps

  1. 1

    Choose your file

  2. 2

    Adjust the available options

  3. 3

    Download or keep working

Practical guidance

When to use Deduplicate lines

Best for

Cleaning, comparing or measuring TEXT before publishing, importing or sharing it.

What you get

Keeps the processed TEXT in this browser session unless you copy or download it.

Useful tip

Review whitespace, capitalization and line-ending options when exact matching matters.

Good to know

Frequently asked questions

Does my file leave my device?+

No. This tool processes your file inside your browser and does not send its contents, name or metadata to Filemivo.

Is Deduplicate lines free?+

Yes. It is free to use and has no artificial file-size limit. Your browser and device memory determine the practical limit.