Built for config reviews, not generic JSON diff

Review config changes,
without the noise.

Paste your template as A, your environment config as B. See only what actually changed.

Open the tool View live demo

No sign-up. No server. Runs entirely in your browser.

Template Asource of truth

Target Benvironment config

A:B

Key order aligned automatically

Reordering noise removed before comparison

3 real changesready to review

2 changed1 added

DiffViewr / visual comparelocal

Template (A)appsettings.tpl.json

2 "Serilog": {

3 "MinimumLevel": {

4 "Default": "Information",

5 -

6 "Override": {

7 "Microsoft": "Information"

8 }

9 }

10}

Aligned (B)appsettings.stg.json

2 "Serilog": {

3 "MinimumLevel": {

4 "Default": "Warning",

5 "System": "Information",

6 "Override": {

7 "Microsoft": "Warning"

8 }

9 }

10}

2changed1added7aligned

100% client-sideno account, no upload

JSON · YAML · .ENVformat-aware compare

Template A → Target Bsource-of-truth flow

GitHub-readycleaner PR diffs

Signal extraction

Review the change, not the churn.

94%less noise to inspect

Standard git diffappsettings.stg.json

lines flagged
as changed

44 are just key reordering

3 are real value changes

normalize

DiffViewr resultreview ready

real value
differences

Serilog.Default changed

Serilog.Override.System changed

Api.TimeoutSeconds changed

See this example in the tool

Template · Target · diff

The only diff tool that treats one file as the source of truth.

Most tools treat both sides equally. DiffViewr treats Template A as the reference, so your target config is aligned to it before comparison.

Template-aligned comparison

Reorder Target B against Template A first, then review the differences that still matter.

template.yml

logging:

level: info

path: /var/log

system:

region: eu

→

target reordered

logging:

level: debug

path: /var/log

system:

region: eu

Visual compare preview

Changed, missing, and extra values stay readable in a fast side-by-side pass.

missing

- Serilog.Default: Warning

Microsoft.Default: Info

added

+ System: Enabled

Microsoft.Default: Debug

Format detection

Paste config and get validation feedback before comparing.

JSONYAML.ENV

Export clean, reordered config

Generate a clean result that is easier to review, commit, and share.

Copy Config

Common workflows

For the 10 minutes before every deployment.

pre-release

Compare appsettings files before a release

env drift

Review staging vs production config

pull request

Normalize noisy JSON diffs in PRs

deployment

Spot meaningful environment changes

No paste limits · No watermarks · No account

Try it on your config

Review config changes,without the noise.