Seeft.io

SEEFT TOOLS

Simple tools for concrete work

Format, validate and transform data with fast utilities. Every tool clearly states where processing happens.

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Core tool

Data Transformer

Explore, refine, filter and map CSV and JSON without uploading data to a server.

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Quick CSV actions

CSV ViewerCSV CleanerCSV Column Mapper

Transform and prepare data

Fix, convert, compare and remap CSV and JSON datasets.

JSON ↔ CSV

Convert JSON to CSV and CSV to JSON in one tool.

LocalFree
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CSV and JSON Data Diff

Compare two datasets to find added, removed and changed records.

LocalFree
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JSON, XML and YAML

Format, validate, convert and query structured documents.

JSON Formatter & Validator

Check syntax, locate errors, and format or minify JSON.

LocalFree
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XML Formatter & Validator

Format and validate XML in your browser.

LocalFree
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JSON ↔ YAML

Convert both ways while retaining structures and value types.

LocalFree
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XML ↔ JSON

Convert XML to JSON and JSON to XML with attributes and text.

LocalFree
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XPath Tester

Run XPath on XML and inspect nodes, attributes and values.

LocalFree
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JSONPath Tester

Query JSON with paths, wildcards and safe filters.

LocalFree
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Encoding, security and identifiers

Encode values, inspect tokens and generate identifiers or digests.

Base64 Encoder / Decoder

Encode and decode Unicode text or files as Base64.

LocalFree
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URL Encoder / Decoder

Encode or decode URL parameters and components.

LocalFree
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UUID Generator

Generate UUID v4 and v7 values in bulk and in your preferred format.

LocalFree
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Timestamp Converter

Convert Unix timestamps, milliseconds, ISO 8601 and readable dates.

LocalFree
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Hash Generator

Calculate SHA-1, SHA-256, SHA-384 and SHA-512 hashes.

LocalFree
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JWT Decoder

Read the header and payload of a JSON Web Token.

LocalFree
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Development and automation

Test patterns, schedules and queries while you build.

Regex Tester

Test patterns, flags, groups and replacements in real time.

LocalFree
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Cron Builder

Compose five-field cron expressions and preview upcoming runs.

LocalFree
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SQL Formatter

Format queries in the most common SQL dialects.

LocalFree
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