Skip to content

Text tools / JSON formatter5 tools

Best JSON formatters

Pretty-print and validate JSON. Facts come from each tool's own pages, and every score says where it comes from. How we rank

Tools
5
Researched
3
Free option
0
Only listed
2

Disclosure: agathox makes some of the tools listed here. They are labelled and scored by the same method as every other tool.

Made by agathox · free, no sign-up, runs in your browser

Need JSON formatter right now? Try ours.

We build this tool, so it is labelled. It is scored with the same tests as the rest, and this box never changes the ranking below.

JSON formatter on agathox

Ranked by signals we can measure or quote: website health, the facts each tool's own pages state, and community discussion. Nothing here has been hands-on tested yet, so this is not a quality test. How the signals rank works

Quick answer

  • No signup needed: agathox text tools
  • Files stay on your device: agathox text tools

Based on what each tool's own pages say. A tool is left out when its pages say it varies or do not say. Details are listed under each tool.

Show only:

Want two of these head to head? Compare tools side by side.

  • 1

    JSON Crack

    UnclearSignup unclearFile handling unclearHealth 3.9
    Open JSON Crack
    Details and sources
    Free tier
    Not stated.
    Paid plan
    Not stated.
    Signup
    Not stated.
    Watermark
    Not stated.
    Where files go
    The privacy policy says data pasted into the editor is not stored or processed on its servers. It does not explicitly say processing happens in the browser. No retention period is stated for pasted data.

    From the tool's own pages, checked 2026-11-01. Sources: Privacy policy. Prices and limits change; check the tool before you rely on them.

    Full page for JSON Crack

  • -

    agathox text toolsMade by agathox

    UnclearNo signupFiles stay on your device—
    Open agathox text tools
    Details and sources

    No facts have been read from this tool's pages yet.

    Full page for agathox text tools

  • -

    JSON Editor Online

    UnclearSignup unclearFile handling unclear—
    Open JSON Editor Online
    Details and sources
    Free tier
    Not stated.
    Paid plan
    There are two paid plans: Ad-Free for $2/month and Developer for $5/month. The page says: “Ad-Free. $ 2 /month . Billed at $24/year. Subscribe Billing: Monthly Quarterly Annual Developer. $ 5 /month . Billed at $60/year.”
    Signup
    Not stated.
    Watermark
    Not stated.
    Where files go
    Not stated.

    From the tool's own pages, checked 2026-11-08. Sources: Pricing. Prices and limits change; check the tool before you rely on them.

    Read automatically by a program, not by a person. Each fact quotes the sentence it came from, and a fact is shown only if that sentence is on the page. Where a page did not say, it reads “Not stated.”

    Full page for JSON Editor Online

Answers come from each tool's own pages (“Unclear” means they do not say). Tick “Compare” on two to four tools to read them side by side.

Also listed (2, not yet tested)

Each of these answered when we visited its site. We have not tested them or recorded facts, so they are in alphabetical order, not ranked.

Other Text tools rankings

Know a tool that should be here? Submit it, or write to hello@agathox.com.

Something wrong or out of date on this page? Tell us and we will fix it.

Search tools

Search tools and tasks