Browser-first processing

Useful tools.
Your files stay with you.

A serious everyday toolbox for images, PDFs, spreadsheets, text and developer tasks. Fast local processing, no account required.

Local processingClear file handlingNo signup
Processing modelON-DEVICE
1Choose file
2Your browser
3Download result
The file itself is not sent to our processing server.

The page can still load normal website assets. Optional analytics and advertising stay off unless configured and consented.

34working tools
0processing servers in V1
100%on-device tool catalog
StaticCloudflare-ready architecture
Toolbox

Everything in one fast workspace

Search by task or filter by category.

Images

Image Compressor

Compress JPEG and WebP images locally with a visual quality control and no upload.

On-device
Images

Image Resizer

Resize images to exact pixel dimensions in your browser while preserving aspect ratio when requested.

On-device
Images

Image Converter

Convert images between PNG, JPEG and WebP locally in your browser.

On-device
Images

Rotate & Flip Image

Rotate images by 90, 180 or 270 degrees and flip them horizontally or vertically.

On-device
Images

Grayscale Image

Convert an image to grayscale locally without sending the file anywhere.

On-device
Images

Remove Image Metadata

Create a clean re-encoded copy of an image without common embedded metadata.

On-device
Images

Image to Base64

Convert a local image into a Base64 data URL directly in your browser.

On-device
Images

Base64 to Image

Decode a Base64 image or data URL and download the resulting image file.

On-device
PDF

Merge PDF

Combine multiple PDF files into one PDF locally in your browser.

On-device
PDF

Split PDF

Extract a page range from a PDF into a new PDF without uploading the document.

On-device
PDF

Extract PDF Pages

Extract selected individual pages from a PDF into a new document.

On-device
PDF

Images to PDF

Combine JPG and PNG images into a PDF in the order you select them.

On-device
Data

CSV to JSON

Convert CSV, TSV, semicolon or pipe-delimited data into formatted JSON locally.

On-device
Data

JSON to CSV

Convert an array of JSON objects into standards-friendly CSV.

On-device
Data

CSV Cleaner

Trim cells, normalize whitespace and remove completely empty rows from delimited data.

On-device
Data

CSV Duplicate Remover

Remove duplicate rows from CSV using all columns or a selected key column.

On-device
Data

CSV Search & Filter

Search a CSV across all columns or filter against a specific column and export matches.

On-device
Data

Header Cleaner

Standardize messy CSV column headers into clean unique snake_case field names.

On-device
Data

CSV Column Selector

Keep only the columns you need from a CSV and export a smaller clean file.

On-device
Data

CSV Sorter

Sort delimited data by a chosen column in ascending or descending order.

On-device
Developer

JSON Formatter & Validator

Validate and pretty-print JSON with readable error messages.

On-device
Developer

JSON Minifier

Validate JSON and remove unnecessary whitespace to reduce size.

On-device
Text

Duplicate Line Remover

Remove duplicate text lines while preserving the original order.

On-device
Text

Case Converter

Convert text to upper, lower, title, sentence, snake, kebab or camel case.

On-device
Developer

URL Encoder & Decoder

Encode or decode URL components safely in your browser.

On-device
Developer

Base64 Text Encoder

Encode UTF-8 text to Base64 or decode Base64 back to Unicode text.

On-device
Developer

Hash Generator

Generate SHA-256, SHA-384 or SHA-512 hashes locally using Web Crypto.

On-device
Developer

GZIP Compress & Decompress

Compress files to GZIP or decompress GZIP files with the browser Compression Streams API.

On-device
Security

Secure Password Generator

Generate cryptographically secure passwords locally with configurable length and character sets.

On-device
Developer

UUID Generator

Generate one or many RFC 4122 version 4 UUIDs using the browser crypto API.

On-device
Data

Data Quality Validator

Audit delimited data for blank cells, duplicate rows, duplicate headers and inconsistent row widths.

On-device
Data

CSV Splitter

Split a large CSV into smaller files by row count while keeping the header in every part.

On-device
Data

CSV Compare

Compare two CSV files by a key column and export added, removed and changed rows.

On-device
Data

Excel Search

Search every sheet in an Excel workbook and export matching cells with sheet, row and column locations.

On-device
Trust built into the interface

Know what happens before you click Run

01

Processing labels

Every V1 tool is marked On-device so you know the selected file is processed locally.

File handling →
02

Truthful progress

We show actual processing stages and only show a percentage when it can be measured honestly.

Read the FAQ →
03

Security controls

Restrictive browser security headers, no application secrets, and optional services disabled by default.

Security Center →
Simple by design

Choose. Process. Download.

There is no account wall and no hidden upload fallback for the V1 tool catalog.

  1. 1Choose your inputFiles are read only after you select them.
  2. 2Process locallyYour browser does the computation on your device.
  3. 3Download the resultThe generated output is returned directly to you.
Advertisement space

Reserved for a future non-blocking placement. Tool access must never depend on clicking an ad.

Privacy controls

Choose what is optional

File contents used by on-device tools are not an optional tracking category and are not sent to a Locrivo processing server.