Local by default
JSON, text, image and video transformations run on your device, keeping work-in-progress payloads out of an upload queue
Review data boundaries →Free · browser-local · no account
Useful browser tools, with the edges explained.
Convert JSON, data, images and video without uploading working files. Every tool includes a reproducible example, review notes and format-specific limitations.
- 30
- working tools
- 13
- original guides
- 22
- verified outputs
Start here
Most-used tools
Four direct paths for formatting data, compressing images and working with HLS video.
01JSON
Format & inspectJSON Formatter
Beautify JSON with readable indentation and immediate syntax feedback.
02Image
Shrink image filesImage Compressor
Compress PNG, JPEG and WebP images in batches without uploading them.
03Video
Play HLS streamsM3U8 Video Player
Play public M3U8 / HLS video streams with a clean browser-based player.
04Video
Create HLS packagesVideo to M3U8
Convert local video files into a downloadable M3U8 playlist and HLS segments.
05Encoding
URL Parser
Parse a URL into its components and explore nested query parameters.
06Frontend
Redirect Checker
Trace a URL's redirect chain and compare responses for common browser user agents.
07JSON
JSON Validator
Validate JSON and get a clear summary of its structure and values.
08JSON
JSON Minifier
Remove unnecessary JSON whitespace while preserving every value.
09JSON
JSON Key Sorter
Sort object keys recursively for stable diffs and predictable snapshots.
10JSON
JSON to TypeScript
Infer practical TypeScript interfaces from a real JSON sample.
11JSON
JSON to Zod
Turn sample JSON into a readable Zod validation schema.
12JSON
JSON to JSON Schema
Infer a Draft 2020-12 JSON Schema from representative data.
13Data
JSON to YAML
Convert JSON into clean, human-readable YAML configuration.
14Data
YAML to JSON
Parse YAML safely and return consistently formatted JSON.
15Data
JSON to CSV
Flatten JSON records into spreadsheet-ready CSV rows.
16Data
CSV to JSON
Convert CSV rows into an array of named JSON objects.
17Data
JSON to XML
Build well-formed XML from nested JSON objects and arrays.
18Data
XML to JSON
Parse XML documents into readable, structured JSON.
19Frontend
JSON to HTML Table
Generate semantic HTML table markup from JSON records.
20Frontend
JSON to Markdown Table
Turn JSON records into a clean Markdown table for documentation.
21Encoding
URL Encoder / Decoder
Encode or decode URL components without damaging Unicode text.
22Encoding
Base64 Encoder / Decoder
Encode UTF-8 text to Base64 or decode Base64 back to text.
23Encoding
HTML Entity Encoder / Decoder
Encode unsafe HTML characters or decode entities into readable text.
24Frontend
JWT Decoder
Decode JWT headers and payloads locally without verification or transmission.
25Frontend
Unix Timestamp Converter
Convert Unix seconds or milliseconds into ISO and local dates.
26Frontend
HEX / RGB / HSL Converter
Convert CSS colors between HEX, RGB and HSL representations.
27Frontend
UUID Generator
Generate cryptographically strong UUID v4 identifiers in bulk.
28Frontend
SHA-256 Hash Generator
Create a lowercase SHA-256 digest from UTF-8 text.
29Image
Photo Collage Maker
Arrange up to 16 photos, annotate the canvas and export a polished collage locally.
30Frontend
CSS Formatter / Minifier
Format compact CSS for reading or minify CSS for delivery.
Built for careful work
A useful result includes the edges
XXF combines focused browser tools with explanations of what each conversion preserves, what it cannot infer and what deserves review before production use
Specific guidance
Every tool page includes a reproducible example, workflow, useful scenarios, format-specific limitations and a visible review date
Review standards →Reviewable output
Keep the source visible, inspect errors, compare the result and copy or download only after it matches the destination contract
Input → review → outputTechnical field notes
Understand the format, not only the conversion
Original guides cover syntax, runtime validation, data-shape mismatches and security boundaries that are easy to miss in a one-click workflow
01 · 3 min read
How to format and validate JSON without leaking data
A practical workflow for reading unfamiliar JSON, finding syntax errors and keeping sensitive payloads on your device.
Read guide ↗02 · 3 min readFrom JSON response to safe TypeScript types
Generate a useful first draft from real API data, then harden it for nullability, optional fields and changing backend responses.
Read guide ↗03 · 2 min readJSON vs YAML: choosing a configuration format
Compare strict machine-friendly JSON with concise human-edited YAML and convert safely between the two.
Read guide ↗04 · 3 min readHow to convert JSON and CSV without broken rows
Handle headers, nested objects, quoted commas and spreadsheet-oriented data shapes predictably.
Read guide ↗05 · 2 min readFrontend encoding cheat sheet: URL, Base64 and HTML entities
Know which encoding belongs in URLs, transport wrappers and HTML text—and which problems encoding cannot solve.
Read guide ↗06 · 3 min readHow to inspect JWT tokens safely
Decode headers and claims without confusing readable payloads with verified identity or authorization.
Read guide ↗Before you paste
Know where the data goes
Use the public tools without an account, then copy or download the reviewed result
Does XXF upload the data I paste into a tool?+
Text and file transformations run in the current browser tab. XXF does not receive or store converter input. The redirect checker is the exception: it sends only the public URL you ask the server to inspect, and the M3U8 player requests the stream directly from its host.
Are generated types and schemas ready for production?+
They are starting points inferred from the sample you provide. Review optional fields, nullability, formats, ranges and business rules, then validate untrusted data at runtime.
Why does every tool include its own guide?+
Format conversion has edge cases that a button cannot explain. Each page documents the expected input, a reliable workflow, practical uses and limitations specific to that tool.
Can I use XXF without creating an account?+
Yes. The public tools are free to use without registration. Copy or download the result when you are finished because local editor contents are not stored as an account history.