AppHelp category hub

Data Conversion Tools for Time, Tables, Query Strings, and Files

Utilities for converting timestamps, tabular data, query strings, JSON, CSV, Markdown tables, PDFs, and small structured payloads locally.

16 live toolsPublished 2026-05-31Updated 2026-05-31Back to all tools

Quick answer

AppHelp data tools help convert between common operational formats such as timestamps, query strings, JSON, CSV, Markdown tables, PDFs, and text-friendly encodings without requiring accounts or uploads by default.

Workflows

Choose the right data tool

Convert dates and identifiers

Translate Unix timestamps, ISO strings, UUIDs, and short operational values into formats that are easier to read and copy.

Move between table formats

Turn CSV, JSON, and Markdown table content into reviewable formats for docs, specs, and lightweight data cleanup.

Prepare local document outputs

Use PDF and document utilities when small file workflows need browser-local processing and downloadable results.

Tool list

Data tools on AppHelp

Every listed tool opens on its own canonical AppHelp subdomain and runs in the browser with no upload by default.

Base64 Encoder and Decoder

Convert text and small payloads between plain text and Base64.

A basic utility definition for safe encoding checks, JWT segment inspection, and clipboard-friendly transformations.

base64encodedecodetext

Open tool

Timestamp Converter

Translate Unix timestamps, ISO strings, and local dates.

Designed for event timestamps, date inputs, time zone checks, and product copy that needs precise dates.

timeunixisotimezone

Open tool

JSON to YAML Converter

Convert between JSON and YAML with adjustable indentation locally.

Handy for config files, CI pipelines, and Kubernetes manifests with two-way conversion and no upload.

jsonyamlconfigconvert

Open tool

JSON to CSV Converter

Convert JSON arrays to CSV and CSV back to JSON locally.

Useful for spreadsheets, data exports, and flattening nested objects with selectable delimiters.

jsoncsvconvertdata

Open tool

JSON Diff

Compare two JSON documents and list added, removed, and changed keys.

Use it for API response diffs, config reviews, and snapshot comparisons with a path-based summary.

jsondiffcomparedata

Open tool

Markdown to HTML Converter

Convert Markdown to HTML and HTML back to Markdown locally.

Handy for docs, README files, CMS content, and email with a live preview and clean round-trip.

markdownhtmlconvertpreview

Open tool